Related
Hi,
After changing my phone's date into the future, my G2 Touch told me there was an update available, so I told it to go ahead and apply it. When the phone rebooted it came up with this message:
E:No signature (218 files)
E:Verification failed
Installation aborted
I have nandroid installed on the phone. At least I think that's what's installed - I haven't played with any ROM stuff since November I think, when I changed the bootloader (I think - if that's what's giving me the option to do a nandroid backup now) and installed the newest T-Mobile G2 ROM.
Should the phone be able to install the OTA update, or will I have to replace the bootloader in order to get the OTA update on there? If I do have to replace the bootloader, will that require a full wipe?
James
Completely the same problem with HTC Hero after European OTA update. It has been rooted while ago (by following instructions from this forum) and now after setting up date in the future and confirming update, phone reboot and I get "Android System recovery" screen with menu and this message bellow it:
Build: CyaanogenMod v1.4 + JF
Finding update package ...
Opening update package ...
Veryfing update package ...
E: No signature (218 files)
E: Verification failed
Installation aborted.
Click to expand...
Click to collapse
I have the same problem (I did not write down the message, so I'm not sure which "Build:" was listed) .
The update fails, the phone reboots and then works under the old build. Under "settings/about phone" there is also no info about the update. Can one force the phone to download the update a second time? Would this help?
Bye
Nick
P.S. I'm running the phone in Germany over e-plus as network provider. The updates was done over a WiFi connection. The phone is not branded - was from the free market and not from a provider.
Hey,
got the same problem. At least I could extract the official OTA-update-zip to publish it here (see attachment)
There also is a "recovery.img" in the update zip, so I guess usually the OTA update will kill custom recovery bootloaders. We could replace the "recovery.img" in the zip with a hacked one before applying the update.
However first we should fix the verification error...
P.S.: Also Germany, not branded, Vodafone Network
Does anyone know if I will lose all my data if I reflash the original recovery.img onto my phone?
As I used flashrec to flash ra-recovery.img I keept all my data. So I don't belive you will lost any of your data except of your actual recovery image.
At last, we can try to flash origianl RUU, but with this we lost all our personal data.
----
I tried it. I installed flasrec.apk using ASTRO and used this app to flash the recovery.img from here mentioned/linked OTA update zip. Afterwards I changed date again and was able to install OTA Update without errors and loosing personal data. Now I'm without nandroid because of changing recovery image. Keep cool at this procedure installing these flashes takes long time in boot process - I was really near an hard reset ...
Flashing the original recovery.img should not be a problem.
However, I don't want to lose root access, and thus I will wait for the official HTC 2.1-update (hoping someone publishes it online) and then flash it by myself..
I don't mind losing root access at this moment (the reason I rooted my phone was to get wifi tethering but never got it working with a mac).
Since I am total noob with android stuff, I would highly appreciate some step by step instructions or link where I can find what to do. Thanks guys.
Hi, I've been trying to install the recovery.img from the update but I get this message with flashrec 1.1.3:
Code:
"Flash FAILED: Could not run command."
I'm using WWE 405.66 flashed with ra-recovery img 1.6.2... and the rom is rooted.
What am I doing wrong?
I can't even install ra-recovery with flashrec now and I have installed ra-recovery 1.6.2 this morning (I was using 1.5)
And yes, I know I'm going to lose ra-recovery.
rseffner said:
As I used flashrec to flash ra-recovery.img I keept all my data. So I don't belive you will lost any of your data except of your actual recovery image.
At last, we can try to flash origianl RUU, but with this we lost all our personal data.
----
I tried it. I installed flasrec.apk using ASTRO and used this app to flash the recovery.img from here mentioned/linked OTA update zip. Afterwards I changed date again and was able to install OTA Update without errors and loosing personal data. Now I'm without nandroid because of changing recovery image. Keep cool at this procedure installing these flashes takes long time in boot process - I was really near an hard reset ...
Click to expand...
Click to collapse
What was the rom you were using when you flashed the official recovery?
alvaritolalala said:
Hi, I've been trying to install the recovery.img from the update but I get this message with flashrec 1.1.3:
Code:
"Flash FAILED: Could not run command."
I'm using WWE 405.66 flashed with ra-recovery img 1.6.2... and the rom is rooted.
What am I doing wrong?
I can't even install ra-recovery with flashrec now and I have installed ra-recovery 1.6.2 this morning (I was using 1.5)
And yes, I know I'm going to lose ra-recovery.
Click to expand...
Click to collapse
Try the following:
- Copy the recovery.img to your SD card
- Turn off the phone, turn it on with Buttons "HOME"+"ONOFF" pressed such that the ra-recovery which you already have starts
- connect to your phone by cable using "adb shell"
- Then with root access you can flash the image by typing "flash_image recovery /sdcard/recovery.img"
This should do it
jamesots said:
Hi,
After changing my phone's date into the future, my G2 Touch told me there was an update available, so I told it to go ahead and apply it. When the phone rebooted it came up with this message:
E:No signature (218 files)
E:Verification failed
Installation aborted
I have nandroid installed on the phone. At least I think that's what's installed - I haven't played with any ROM stuff since November I think, when I changed the bootloader (I think - if that's what's giving me the option to do a nandroid backup now) and installed the newest T-Mobile G2 ROM.
Should the phone be able to install the OTA update, or will I have to replace the bootloader in order to get the OTA update on there? If I do have to replace the bootloader, will that require a full wipe?
James
Click to expand...
Click to collapse
hey,
I had same problem
go to All programs--> Recovery Flasher--> Restore backup
then restart and update OTA
Greetings from Zagreb, Croatia
Hey guys.
So, for those of you, who do NOT care about root for now, here's what worked for me:
1.: Download the zip-file with the OTA Update, mentioned on the first page and extract it.
2.: Connect your Hero to your PC and copy the recovery.img from the OTA onto your sdcard. Disconnect from computer.
3.: Boot your phone into the bootloader (Home + PWR).
EDIT: Now connect the phone to the pc again!
4.: open the command prompt of your pc, navigate to your Android SDK folder. (If it is not installed, download it and make sure you've got the needed drivers. Otherwise: Download them, using the Setup.exe from Android SDK)
5.: Here are the needed commands:
Code:
adb shell
$su
mount -a
flash_image recovery /sdcard/recovery.img
6.: reboot your phone after exitting the command prompt.
7.: Factory reset, reboot again
8.: And well, wait for the update-window again and be happy, now it should work
EDIT 2:
Any questions? Just leave a reply
@Revoluzifer
OK I did exactly as you explained, but having problem with su command:
Code:
C:\sdk\tools>adb shell
adb server is out of date. killing...
* daemon started successfully *
/ # su
su
/sbin/sh: su: not found
I know I know, you're going to say my phone is not rooted at all But believe me it was and some apps that require root access are there (screenshot, wifi tether etc.).
I even tried to find su cmd with find:
Code:
C:\sdk\tools>adb shell
adb server is out of date. killing...
* daemon started successfully *
/ # su
su
/sbin/sh: su: not found
But got nothing as you can see.
Ideas?
@dinke:
Which bootloader / recovery console is installed?
Means, what do you see, after booting with Home + PWR?
Also try to input $su instead of just su.
But first tell me your "hack" if any
@Revoluzifer
Thanks for quick reply
I see Android system recovery screen, not sure if this is nandroid or what but have this text on the screen with following options:
Android system recovery <2>
Use trackball to highlight;
click to select.
[Home+Back] reboot system now
[Alt+S] apply sdcard:update.zip
[Alt+W] wipe data/factory reset
[Alt+B] nandroid v2.2 backup
[Alt+R] restore latest backup
[Alt+F] repair ext filesystems
-------------------------------
Click to expand...
Click to collapse
And bellow menu there is build ID:
Build: CyanogenMod v1.4 + JF
I don't remember exact procedure that I applied for rooting hero, but I followed instructions from this forum (I can try by searching for exact thread if that may help you).
Edit: I applied root procedure by following instructions on these two links:
http://forum.xda-developers.com/showpost.php?p=4257045
http://forum.xda-developers.com/showthread.php?t=559613
That sounds just perfect
CyanogenMod 1.4 is exactly the same recovery console i have had before.
(Btw, Hero is not officially supported by CM anymore, had a nice discussion yesterday in cyanogen IRC )
So, try to use $su instead of su, that's what I typed and it all worked just great.
But you definitely first booted into bootload and then connected the phone to your pc again?
Tell me if this worked for you, please...
Greetz,
Sven
dinke said:
Code:
C:\sdk\tools>adb shell
adb server is out of date. killing...
* daemon started successfully *
/ # su
su
/sbin/sh: su: not found
Click to expand...
Click to collapse
Forget about the "su". You are already root.
(You can see this, as there's a '#' in front)
Just do the mounting and flashing
Oh... You're right, nerdture... didn't see the #
I *think* I've tried mount no matter of missing 'su' cmd and it didn't work either but will try again as soon as I manage to find some cable to connect hero with macbook (no longer nearby windows machine but have sdk installed on mac so should be working as well)
Revoluzifer said:
But you definitely first booted into bootload and then connected the phone to your pc again?
Click to expand...
Click to collapse
Yes
Hi Everyone,
I know, I fell in a noob trap doing this and I already hate myself for it : I tried to OTA update my rooted Honor 7 and the device remained stuck in TWRP after reboot.
Log showed the following message in red : "E: error executing updater binary in zip"
I proceeded to a wipe and managed to start the system. This allowed me to unroot my phone, thinking I would then be able to update from a clean basis.
Unfortunately, the same error occurred and I am now stuck in TWRP again...
I would be grateful if anyone could provide me some leads to get out of my noob trap...
Thank you very much !
Edit : I finally understood how i managed to start system (I deleted the update.zip file and wiped again). Still, now how can I update to the latest version without getting stuck again in TWRP ? Thank you !
Prowls said:
Hi Everyone,
I know, I fell in a noob trap doing this and I already hate myself for it : I tried to OTA update my rooted Honor 7 and the device remained stuck in TWRP after reboot.
Log showed the following message in red : "E: error executing updater binary in zip"
I proceeded to a wipe and managed to start the system. This allowed me to unroot my phone, thinking I would then be able to update from a clean basis.
Unfortunately, the same error occurred and I am now stuck in TWRP again...
I would be grateful if anyone could provide me some leads to get out of my noob trap...
Thank you very much !
Edit : I finally understood how i managed to start system (I deleted the update.zip file and wiped again). Still, now how can I update to the latest version without getting stuck again in TWRP ? Thank you !
Click to expand...
Click to collapse
You have to flash stock recovery before update and unroot of course.
Sent from PLK-TL01H
Lucki_X said:
You have to flash stock recovery before update and unroot of course.
Sent from PLK-TL01H
Click to expand...
Click to collapse
Thank you for your answer ! I found the image of the stock recovery but I can only find instructions for windows and I run on mac... Do you happen to know how can I get to flash the recovery image using terminal ?
Thank you again !
Hi, I need help with my phone, I accidentally changed the permissions (using ROM Toolbox Lite) from the system folder making the phone crash shortly after. Now it shows the Alcatel logo and shuts off and back on in recovery mode.
I'm new with adb and CWM/TWRP stuff, but I can't find the device using adb (I installed the usb drivers correctly) , it only finds on sideload and even then I get "error: closed"...and with CWM/TWRP I can't use sideload because:
"You need adb 1.0.32 or newer to sideload to this devices" (and I used 1.0.36)
And with zip file (CWM) method I get:
"E:failed to verify whole-file signature
E:signature verification failed
Installation aborted"
Please help, I can't find the stock rom for this phone
Did you find a solution? HAve a Bootloop too
Prestnaut said:
Did you find a solution? HAve a Bootloop too
Click to expand...
Click to collapse
Nope unfortunately
Any news ?
HAve a Bootloop too , after trying to unroot with kingo .
Need stock boot.img or recovery.img in order to build custom rom from source
VTRF8FF.TMP said:
Hi, I need help with my phone, I accidentally changed the permissions (using ROM Toolbox Lite) from the system folder making the phone crash shortly after. Now it shows the Alcatel logo and shuts off and back on in recovery mode.
I'm new with adb and CWM/TWRP stuff, but I can't find the device using adb (I installed the usb drivers correctly) , it only finds on sideload and even then I get "error: closed"...and with CWM/TWRP I can't use sideload because:
"You need adb 1.0.32 or newer to sideload to this devices" (and I used 1.0.36)
And with zip file (CWM) method I get:
"E:failed to verify whole-file signature
E:signature verification failed
Installation aborted"
Please help, I can't find the stock rom for this phone
Click to expand...
Click to collapse
Hi, My 6044d also in boot loop, not rooted so I can't get stock boot.img or recovery.img in order to compile CWM and CM from source for this particular phone. Please someone post it and of course, when compiled I'll post back de results for all of us that need a custom ROM for this phone. It's crazy that this phone is not so popular and the common custom roms don't have one for it out of the box, that's why I decided to compile it myself, but I can't get my boot.img or recovery.img to configure build environment for this especific phone.
Thanks in advance!
miuserdexda said:
Hi, My 6044d also in boot loop, not rooted so I can't get stock boot.img or recovery.img in order to compile CWM and CM from source for this particular phone. Please someone post it and of course, when compiled I'll post back de results for all of us that need a custom ROM for this phone. It's crazy that this phone is not so popular and the common custom roms don't have one for it out of the box, that's why I decided to compile it myself, but I can't get my boot.img or recovery.img to configure build environment for this especific phone.
Thanks in advance!
Click to expand...
Click to collapse
Hey, sorry for taking so long to answer, i actually got 2 mega.co.nz links for this, another user gave them to me ^^
https://mega.nz/#F!XAkUDajB!EaYNGGsABPapaVFkeGNqTw
and
https://mega.nz/#!Ncx2VASY!gfxVbnQj9HK9WUGiidKY83pJZA7ToTQu5RFDfu2miWE
I found your other post too, and given that im a noob i tried to reply there, then i was trying to private message you (failed cause im not smart xD) and now im here :3
Tell me if something goes wrong, i didnt check this myself cause i sent my phone to repair, it was so broken they didnt knew it was rooted xD
Best of Luck ^^
And yeah, this phone is not popular at all, not even Alcatel cares, i emailed them to see if they were gonna release some updates, didnt even got a reply until now
But well, im gonna check out what youre doing, sowwie im a copycat xD
Good luck again ^^
I'm a little bit late but if you still need or someone else needs it just let me know as I have Carliv Touch and stuck recovery for this device.
Little late as well, but do you still have that recovery? i picked up my phone again and i wanna mess with it
I've downloaded the stock ROM from the acer site, put it on my SD card and went into recovery to apply the update from the sdcard. When trying to update I got the following error:
e: footer is wrong
e: signature verification failed
Installation aborted.
Now, I've searched everywhere and tried at least 20 different things without anything working. I've unlocked the bootloader and flashed the boot.img which was inside the update file I downloaded from the acer site, I've tried flashing certain files seperatly etc. Another problem is, there is no system.img or recovery.img or any other img file in the stock rom from acer which doesn't allow me to flash it via the fastboot. So either I need to find those img files, or I need a fix for the error above.
Any suggestions?
(One more thing, I really can't try using a custom recovery to disable signature verification because the Liquid Z330 is such an unsupported phone, there is no cwm or twrp recovery for it. I also don't wanna risk trying another phone's cwm or twrp on the Z330 because I don't have the stock recovery.img file in case it doesn't work.)
UPDATE: I found an older version of twrp for the phone and I was able to disable signature verification but when trying to install the zip I get this error log:
Updating partition details...
*in red* E: Unable to mount '/system'
...done
Full SELinux support is present.
MTP Enabled
Installing '/sdcard/update.zip'...
Checking for MD5 file...
Skipping MD5 check: no MD5 file found
Error flashing zip '/sdcard/update.zip'
Any new suggestions as to what might be the problem?
Update2:
So after Ysfzone posted this tutorial:
http://forum.xda-developers.com/general/general/acer-liquid-z330-unbrick-unlock-t3520952
I was able to restore my acer liquid z330.
I did actually run into some trouble with Ysfzone's instructions, and found a way around it, it should be the second comment on the post.
My only problem now is that the system is restored it's booting into demo mode. When I try to update it downloads the update and reboots into TWRP and when I then reboot to the system it says that the install failed. I think it would automatically install the update with the stock recovery but because I have TWRP installed I have to find the downloaded update file and install it manually.
So I have two options:
Either someone tells me where the update download folder is, or someone provides me with the stock recovery.
Any help?
Exactly same issues
Hey there!
I have the exact same issues. I have been trying to unbrick my phone, but nothing has actually worked. My phone is still stuck on the white screen with the acer logo.
Did you make any progress?
Were you able to find out anything that works??
Any help will be appreciated.
Thanks
MK
markendeyk said:
Hey there!
I have the exact same issues. I have been trying to unbrick my phone, but nothing has actually worked. My phone is still stuck on the white screen with the acer logo.
Did you make any progress?
Were you able to find out anything that works??
Any help will be appreciated.
Thanks
MK
Click to expand...
Click to collapse
(If you don't want to read the story, read the last sentence.)
I actually was able to get rid of the MD5 check error by creating a MD5 file myself. You basically have to download an application that gets you the MD5 sum. I used this: http://www.fast-files.com/getfile.aspx?file=127067 (just reuploaded it because I forgot where I got it from). Using the exe file in there I generated the MD5 file in this format: d2a862b7c1a8f66b6d1be32f400dc73e *update.zip. After that I tried installing the zip again, this time I got the same error except with the MD5 error missing. After contacting Acer support, I was basically told that I needed to send my info back so I could get contacted for a repair. But since I flashed the recovery it probably wouldn't fall under warranty.
So basically try emailing Acer support and try and get them to repair it. I havent found a way to fix it myself.
One more thing. It wasn't my phone to begin with, I just tried to fix it for someone. That person already has a new phone and I won't be trying anything anymore to fix the phone since I don't have it anymore.
Hello everyone,
I've been in the same situation as you until few hours.
I've also tried a lot of things which doesn't work at all ( like extracting system.img from the Acer update.zip ).
I've seen that every time I tried to install an update.zip package I get the same error:
E: footer is wrong.
E: signature verification failed
And I solved it by unzipping and zipping it again.
Then when I was able to flash it and get my phone back.
if it still doesn't work with the stock recovery, you may try with a custom recovery ( like twrp, you can easily find it on google )
If you have any questions about it, I can try to answer them.
Hope it'll help !
pxie said:
Hello everyone,
I've been in the same situation as you until few hours.
I've also tried a lot of things which doesn't work at all ( like extracting system.img from the Acer update.zip ).
I've seen that every time I tried to install an update.zip package I get the same error:
E: footer is wrong.
E: signature verification failed
And I solved it by unzipping and zipping it again.
Then when I was able to flash it and get my phone back.
if it still doesn't work with the stock recovery, you may try with a custom recovery ( like twrp, you can easily find it on google )
If you have any questions about it, I can try to answer them.
Hope it'll help !
Click to expand...
Click to collapse
Thanks for the suggestion. Just out of curiousity I guess I'll ask the phone back and try it.
I've tried it again, but the problem isn't because the signature verification fails, its something else. Idk what.
Hello Mounir9912,
Have you try to re-download the file from acer website, or/and to check the zip file with winzip or winrar ?
I've read that you created a md5 file, for my part I just disable md5 verification from TWRP.
It seems like you've got a system mount error, do you still get it if you wipe all partition on your phone (system, cache, data, dalvik cache) ?
Finally, I don't know if it can be useful, but I have a TWRP backup of my z330
I'll stay available if you still have trouble.
pxie said:
Hello Mounir9912,
Have you try to re-download the file from acer website, or/and to check the zip file with winzip or winrar ?
I've read that you created a md5 file, for my part I just disable md5 verification from TWRP.
It seems like you've got a system mount error, do you still get it if you wipe all partition on your phone (system, cache, data, dalvik cache) ?
Finally, I don't know if it can be useful, but I have a TWRP backup of my z330
I'll stay available if you still have trouble.
Click to expand...
Click to collapse
You might just be the godsend I needed. I've already tried everything you said including wiping and disabling the verification. Could you upload the twrp backup somewhere? It might be the only thing that can save this phone aside from paying way too much money to acer because of a voided warrantee.
Hello Mounir9912,
Here the link to download the twrp backup of my z330:
mega.nz/#!idICgLAZ!uJo_EvbMHAyVju9qo_uWY7d7aVLkpqxmZAWSd8jtmkk
Hope it'll help.
I'll stay available if you still need help.
pxie said:
Hello Mounir9912,
Here the link to download the twrp backup of my z330:
mega.nz/#!idICgLAZ!uJo_EvbMHAyVju9qo_uWY7d7aVLkpqxmZAWSd8jtmkk
Hope it'll help.
I'll stay available if you still need help.
Click to expand...
Click to collapse
Thanks, I'll try it when I get home (in a few hours)
damn, mega is being an asshole. I downloaded it but while downloading I accidentally unplugged the power cable from my laptop and it shut down so I had to redownload. When I downloaded again it cut me off at like 90% because of exceeding the bandwidth quota of 5GB. Now I have to either pay a monthly fee or wait 5 hours...
Hey pixie,
I've actually restored it via twrp, but it still isn't booting past the logo. Could you maybe make a backup of all the partitions except the boot, system and data partitions? The problem is probably in one of those partitions since restoring the boot or system didn't fix it.
more specifically, the ones I could backup are:
Modem, Aboot, pad, modemst1, modemst2, misc, splash, fsg, persist, cache, devinfo, oem
Hi, i'm in the same problem can you give me the link of official rom ? Plz
Ysfzone said:
Hi, i'm in the same problem can you give me the link of official rom ? Plz
Click to expand...
Click to collapse
https://www.acer.com/ac/en/GB/content/support-product/6358?b=1
Its under "OS"
Or direct download link:
http://global-download.acer.com/GDF...30&Step3=Z330&OS=ALL&LC=en&BC=ACER&SC=EMEA_27
Done Done Done !!!!!!
i fixed this problem wooow !!!!!!
This is how to unbrick Acer Liquid Z330
1- Download Official Rom from here : https://www.acer.com/ac/en/GB/content/support-product/6358?b=1
2- Download this tool from : http://www.stupdroid.com/2016/10/tool-systemnewdat-into-flashable-img.html
3- Download python (required for tool in step 2) : https://www.python.org/downloads/
4- Download Drivers the link on step 1
5- Download and install Fastboot (Search for it)
6- Create new Folder and put into all files on tool (step2) and file_contexts + system.new.dat + system.patch.dat + system.transfer.list from the Official rom
7- now launch "system.new.dat 2 flashable img converter" and tap any key and wait... after you got 2 files.. you need just the file called system.new.img
8- move system.new.img to fastboot/adb folder and rename it to system.img
9- enter phone to fastboot mode and type this command :
fastboot -w
fastboot flash system system.img
10- now just wait and don't worry about messages from fastboot...
11- after you finishing type: fastboot reboot
and wait between 5/10 mins for phone booting..
and DONE !!
Sorry for my bad english
Now my phone stuck on demo mode.. i want the stock recovery.img
hello,
first sorry for the delay.
As far as i remember, I've checked all when I backup the phone. But all that things you list are not unknown, I've seen them when the phone was still bricked. By the way, I even made a backup at this moment, so if you think that it can be useful..
Ysfzone, have you try to use qfil to get you're stock recovery ?
Got an update notification on my nexus 6p with installed RR-P-v7.0.2 on it. After installing this OTA update i got an infinite booting screen. I loaded back into twrp and got a password prompt to mount partitions (i didn't have any passwords anywhere on my phone before). I could neither access internal storage from within recovery, nor from pc. Installed newest version of TWRP (3.4.0), didn't help. Did a full wipe, which finally helped and allowed me to see and transfer files to my internal storage. Downloaded RROS-Q-8.5.9 zip from official site, tried to install again, which resulted in same error as before. Then i found out that i can load the system even with this error presenting, but i CAN'T install magisc. I don't know if it is me, who does something wrong or is it error in system zip? Also before each attempt to reinstall RROS-Q-8.5.9 i see logs, that magisc binaries r missing, i don't know if that might be the reason of vendor error in the end. The only way i can fix it is flash official vendor.img and flash older system image. But i really want to have RROS-Q-8.5.9 on my phone, with magics. Initially i posted it in 'Nexus 6P Q&A, Help & Troubleshooting', but no1 responded, so i duplicated this post here in case some1 knows the answer. Please help.
I'm sorry for being unfriendly. I'm lazy.
Most android10rom for angler cannot be flashed without using this twrp. If you want to switch back to pie rom, use the official twrp.
Then your latest post is on the nexus6 shamu thread.
Everyone makes a mistake because the terminal names are very similar. So don't complain to kae.
https://androidfilehost.com/?fid=4349826312261691698
For the time being, there are few posts on this device, so I think it's okay to write here.
https://forum.xda-developers.com/nexus-6p/development/9-0-resurrection-remix-v7-0-t3892786
Thank you for your response anyway. Tho i managed to flash the rom without getting this vendor error at the end. Steps i did: flashed back to RR7.1.2, did a backup, wiped everything including system, than flashed new RR8.6.0, which flashed fine with no errors. After this i flashed magisk right away, and it went fine (it couldn't before, cuz of the error 'failed to mount /vendor' after attempting to flash OS zip), with exception of an error 'failed to mount /vendor (no such device)'. Still i've got nexus 6p with android 10 and root, which can't update, cuz of the permanent vendor error after i flashed magisk.
Next time i will need to flash anything, i will use TWRP u suggested. Thank you again.