Unable to flash the stock fastboot ROM via Mi Flash tool. - Xiaomi Mi 8 Lite Questions & Answers

For whatever reason I can't budge the tool to flash the latest fastboot ROM on my Xiaomi Mi 8 Lite that I plan to sell since my new phone arrived today. A custom ROM from the last year is currently installed on the device.
I installed the latest Universal ADB drivers, installed the latest Mi Flash tool (2020.3.14.0), put the phone in fastboot mode, connected to PC via USB 2.0 port and tried to flash the latest fastboot stable ROM via the tool with "clean all" option and most of the time what happens when I hit the flash button, the fastboot logo on the phone disappears and in the left top corner a small white text "hit any button to restart" or something like that appears. Only once a progress bar appeared with $fastboot bla bla bla II echo missmatching image and device" and that was it... no progress, again the white text prompting me to hit any button to restart appeared on the screen.
Any ideas what I am doing wrong? cmonBruh
Phone: Xiaomi Mi 8 Lite 64/4 Global (platina with custom ROM installed) Windows 10 Pro 1909, MSI B350M Bazooka with AMD Ryzen 5 2600.

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Hello.. I will try to help you.. And tell me if you fixed that..
Can you install a custom recovery? Twrp?
Id you can do that fallow my steps..
First download the fallowing twrp from here :
https://drive.google.com/file/d/14cRc4UG4hzL45cDhdFZ7odr5Kb8LSai0/view
It can support ota update and your phone will boot I used it to flash my mi 8 lite without pc. And works!
Download and flash that twrp using mi flash tool. I hope your bootloader is unlocked if you already have other twrp installed simply flash the twrp zip file. And update your recovery. If you don't have any twrp installed simply rename. Zip file into .img file and flash it with flash tool. If you can't flash it using flash tool try to install any other twrp and then install the zip and update the twrp
After you installed twrp go and download recovery Rom from here :
https://mirom.ezbox.idv.tw/en/phone/platina/
Download the first rom called : V11.0.2.0.QDTMIXM (1.8GB zip file)
( Recovery
miui_MI8LiteGlobal_V11.0.2.0.QDTMIXM_5574e03233_10.0.zip
Filesize
1.8G
MD5
5574e032330450c44c34d7f054de477b
Link
Download (Download to Mi Router)
Press download. Not download to mi router and don't forget.. Download the recovery zip file not the fast boot update!
After you downloaded boot in to twrp which I gave you above, wipe system / data / vendor / cache/dalvik and flash the zip file.
You can flash it with and without to wipe anything. But it is recommended to wipe. Pls go try and install it without to wipe anything, if it works ( for me works!) after flash done boot the phone and see if there is any problem. If u got any bugs or problems perform a clean flash wipe all and then flash!
Id you want root.. Fallow this :
You can root your phone with latest magisc manager using the same twrp. After you flash the boot.img with twrp press restart phone. If it won't restart go again to recovery and format only your data. And your will phone will boot again and you will get root acces. It's the only way to root android 10.
Please let me know if you fixed that problem.. And you flashed successfully the Rom..
DON'T FLASH THE ROM USING ANOTHER TWRP! ONLY THAT RECOVERY I GIVE SUPPORT OTA UPDATE AND CAN BYPASS THE XIAOMI Verification FOR THE STOCK ROM.. IF YOU USE ANY OTHER TWRP YOUR PHONE WILL BE STUCK IN Boot! Orange fox or any other twrp won't work!
I used this method and works like a charm