I modified some graphics settings but now it gives me this error

"GLimp_init() - could not load OpenGL subsystem. copy console log to clipboard?"


(I tried to delete the .cfg file of the mod in documents, tried to reinstall game and mod but still nothing)

(final part of the log error)

SDL version 2.0.18
SDL using driver "windows"
Initializing OpenGL display
Display aspect: 1.778
...setting mode 3: 640 480
Couldn't get a visual
...WARNING: could not set the given mode (3)
Initializing OpenGL display
Display aspect: 1.778
...setting mode 3: 640 480
Couldn't get a visual
...WARNING: could not set the given mode (3)
----- Client Shutdown (Client fatal crashed: GLimp_Init() - could not load OpenGL subsystem) -----
RE_Shutdown( 1 )
Hunk_Clear: reset the hunk ok