LG FlashTool keeps showing the "CheckCommMode FAIL!!!" error - LG G5 Questions & Answers

Hello, my G5 has been stuck in a bootloop for over a year, I've tried to follow some tutorials on how to fix the issue but none of them worked. Since I've read of people being able to fix it with LG FlashTool I tried it too, I was using LG FlashTool V2.0.1.6, the COM port on the phone is set to 41, I told the program to use a FW specified by me and the LGUPc.dll extracted from that same FW. I'm not sure if the FW is the exact same one I have installed on my phone but it is supposed to be installed on it (I know the name of the one installed on my phone but there are multiple FWs with the same name).
Initially LG FlashTool 2.0.1.6 kept showing the "(S) Failed to load." error, but I later managed to download another version (1.8.6.527) which doesn't show that error, though it shows another one once it tries to read the device's information:
{
"lightbox_close": "Close",
"lightbox_next": "Next",
"lightbox_previous": "Previous",
"lightbox_error": "The requested content cannot be loaded. Please try again later.",
"lightbox_start_slideshow": "Start slideshow",
"lightbox_stop_slideshow": "Stop slideshow",
"lightbox_full_screen": "Full screen",
"lightbox_thumbnails": "Thumbnails",
"lightbox_download": "Download",
"lightbox_share": "Share",
"lightbox_zoom": "Zoom",
"lightbox_new_window": "New window",
"lightbox_toggle_sidebar": "Toggle sidebar"
}
The XML log is just a lot of messed up bytes. To me it looks like the serial port is unresponsive.
The steps I took are the exact ones I've seen in this video:
1. Run LGMobileDriver_WHQL_Ver_4.2.0.exe;
2. Run Setup_LGFlashTool_1.8.6.527 and replace MegaLock.dll with the custom one;
3. Run LGH850_DLL.msi;
4. Run LGUP_Store_Frame_Ver_1_14_3.msi;
5. Set the serial port to COM41.
6. Extract: LGUPc.dll and the dz file from the kdz firmware and select them in "LG FlashTool";
_ _ _ _ _
These steps are chronologically different from the ones shown in the vid:
7. Press the Start button on "LG FlashTool";
8. Once "Waiting for connection..." is shown connect the device.
There's only one thing in the LG FlashTool software I installed that differs from the one shown in the vid, there's a text to the right of where the version is displayed, in the vid it reads "LGPTDSMP" but in my version it reads "NPINLOCAL". Can anyone send me the LGTDSMP version, please?
Can anybody help me with this? Thanks in advance.