The problems about GSX.CFG file

[jitboon48]

I can not use gsx and can not do anything after start the game
I has attached the log file, Please check it
Thank you 

[virtuali]

Which airport you are using, default or 3rd party ?

Also, I don't understand why you titled this thread "problems about GSX.CFG file", there's nothing in your log which suggest you have a problem with that file.

[jitboon48]

I tried to fly fenix A320 from VTBD airport which it is 3rd party airport but after I pushed READY TO FLY button then it was come inside the cockpit with GSX tool box in the black dark (no fuction button only black blank box) but I could not do anything even exit the game then I exit the game by ctrl+alt+del and End task MSFS2020
Later I tried PMDG B738 it was no problem. It could play normally
I thaught it was GSX.CFG because I read in log.err file it was told that it was not found gsx.cfg in the folder but I don't know the exactly the problem.

So I had problem when I played only FENIX 320

[virtuali]

GSX tool box in the black dark (no fuction button only black blank box) but I could not do anything

If you mean the GSX menu was all black, it's because you must have unpinned it, and this is not supported.