Hello people!
In my case, the only thing that helped - is DOWNGRADING my nVidia drivers to version 566.99 (as it was recommended to me in logs). I'm using MSI laptop with 4060 graphics card, so maybe new drivers are unstable for MSI laptops.
EDIT: HOLY MOLY YOUR PC IS MADE BY MSI TOO!
You have AMD - and some errors about driver version check in runlog.txt, though, so I guess you can search for info on the recommended drivers version.
I'll linger for a bit to see if it helps anyone.
My runlog.txt (part of it)
29.7.25 09:29:55 0 ---- New session ----
29.7.25 09:29:55 0 Working directory is "C:\Program Files (x86)\GOG Galaxy\Games\Baldurs Gate 3\Launcher"
29.7.25 09:29:55 0 Version 4.67.74.246
29.7.25 09:29:55 0 System locale is "ru-RU"
29.7.25 09:29:55 0 App locale is "ru"
29.7.25 09:29:55 1 Initializing community
29.7.25 09:29:55 1 Platform Galaxy
29.7.25 09:29:55 1 Galaxy beginning authentication
29.7.25 09:29:55 1 Galaxy initialized
29.7.25 09:29:55 1 Checking for mod detection
29.7.25 09:29:55 1 Initializing web component
29.7.25 09:29:55 1 Starting initialization of CEF
29.7.25 09:29:55 1 Initializing SDL
29.7.25 09:29:55 1 Site version 180
29.7.25 09:29:56 1 Starting the driver check
29.7.25 09:29:56 1 No save files found. The profile folder doesn't exist.
29.7.25 09:29:56 1 Galaxy authentication success
29.7.25 09:29:56 1 Galaxy is backend
29.7.25 09:29:56 1 Galaxy state signed in
29.7.25 09:29:56 1 Galaxy state logged on
29.7.25 09:29:56 1 User Nvidia graphics driver version 536.99.0.0
29.7.25 09:29:56 1 Recommended Nvidia graphics driver version 536.99
29.7.25 09:29:56 1 Done with the driver check
29.7.25 09:29:57 1 Galaxy got ticket: OK
29.7.25 09:30:03 0 Run Game "..\bin\bg3_dx11.exe"
29.7.25 09:30:03 1 Launch executable "..\bin\bg3_dx11.exe"
29.7.25 09:30:03 0 Launched executable "..\bin\bg3_dx11.exe"
29.7.25 09:30:04 1 Storage reads per second: 4235
29.7.25 09:30:05 3 {"message": "Invalid request body"} StatusCode1 BadRequest
29.7.25 11:56:53 1 Exiting application
29.7.25 11:56:53 1 Releasing community
29.7.25 11:56:53 1 Galaxy begin shutdown
29.7.25 11:56:53 1 Galaxy cleaning registrar
29.7.25 11:56:53 1 Galaxy signing out
29.7.25 11:56:53 1 Galaxy is signed out
29.7.25 11:56:53 1 Galaxy shutting down
29.7.25 11:56:53 1 Galaxy shutdown done
29.7.25 11:56:53 1 Releasing web component
29.7.25 11:56:54 1 Releasing SDL
29.7.25 11:56:54 1 Releasing internals
29.7.25 11:56:54 1 Exit done
29.7.25 05:26:33 0 ---- New session ----
29.7.25 05:26:33 0 Working directory is "C:\Program Files (x86)\GOG Galaxy\Games\Baldurs Gate 3\Launcher"
29.7.25 05:26:33 0 Version 4.67.74.246
29.7.25 05:26:33 0 System locale is "ru-RU"
29.7.25 05:26:33 0 App locale is "ru"
29.7.25 05:26:33 1 Initializing community
29.7.25 05:26:33 1 Platform Galaxy
29.7.25 05:26:33 1 Galaxy beginning authentication
29.7.25 05:26:33 1 Galaxy initialized
29.7.25 05:26:33 1 Checking for mod detection
29.7.25 05:26:33 1 Initializing web component
29.7.25 05:26:33 1 Starting initialization of CEF
29.7.25 05:26:33 1 Initializing SDL
29.7.25 05:26:34 1 Starting the driver check
29.7.25 05:26:34 1 Site version 180
29.7.25 05:26:34 1 Galaxy authentication success
29.7.25 05:26:34 1 Galaxy is backend
29.7.25 05:26:34 1 Galaxy state signed in
29.7.25 05:26:34 1 Galaxy state logged on
29.7.25 05:26:34 1 No save files found. The profile folder doesn't exist.
29.7.25 05:26:34 1 Galaxy got ticket: OK
29.7.25 05:26:35 1 User Nvidia graphics driver version 536.99.0.0
29.7.25 05:26:35 1 Recommended Nvidia graphics driver version 536.99
29.7.25 05:26:35 1 Done with the driver check
29.7.25 05:26:42 0 Run Game "..\bin\bg3_dx11.exe"
29.7.25 05:26:42 1 Launch executable "..\bin\bg3_dx11.exe"
29.7.25 05:26:42 0 Launched executable "..\bin\bg3_dx11.exe"
29.7.25 05:26:43 1 Storage reads per second: 3167
29.7.25 05:26:43 3 {"message": "Invalid request body"} StatusCode1 BadRequest
29.7.25 05:27:11 1 Exiting application
29.7.25 05:27:11 1 Releasing community
29.7.25 05:27:11 1 Galaxy begin shutdown
29.7.25 05:27:11 1 Galaxy cleaning registrar
29.7.25 05:27:11 1 Galaxy signing out
29.7.25 05:27:11 1 Galaxy is signed out
29.7.25 05:27:11 1 Galaxy shutting down
29.7.25 05:27:11 1 Galaxy shutdown done
29.7.25 05:27:11 1 Releasing web component
29.7.25 05:27:11 1 Releasing SDL
29.7.25 05:27:11 1 Releasing internals
29.7.25 05:27:11 1 Exit done
P. S.: I've had similar
{"message": "Invalid request body"} StatusCode1 BadRequest messages in my log, and, AFAIK, they refer to either sending game statistics, or checking driver versions (when I've disabled both in Larian Launcher, the message disappeared).
P. P. S.: With old drivers, some games have worse performance, so I'll try to upgrade them bit by bit - up until it breaks again.
