Hello,
I installed the server on both Linux and Windows, but same things happened.
On some maps, I can't play because of the following error 'EXE_CLIENT_FIELD_MISMATCH' :
I tried to play this map on solo and on others servers and it worked. Furthermore, some maps are missing wallpaper but still can play on it.
I've read that this error was caused by config mismatched or difficulty (ex: buried, but this one works fine), but I didn't edit any config beside the server password.
Any idea ?