There is a possibility steam is facing any server side issue so, try re-launching XCOM 2 from the steam, but if still the XCOM 2 mods are not working then delete XCOM 2 Document Files, but avoid deleting the document files completely, instead of this just cut and paste them into some other folder.
Documents\Games\XCOM 2\XCOMGAME\config folder
Hope after deleting the games files you are all set to play games without seeing the error the XCOM 2 mods not working problem.
downloaded and installed 37 mods for XCOM2 GOG Version and none of them effect the game at all
in XCOM 2
Posted
There is a possibility steam is facing any server side issue so, try re-launching XCOM 2 from the steam, but if still the XCOM 2 mods are not working then delete XCOM 2 Document Files, but avoid deleting the document files completely, instead of this just cut and paste them into some other folder.
Documents\Games\XCOM 2\XCOMGAME\config folder
Hope after deleting the games files you are all set to play games without seeing the error the XCOM 2 mods not working problem.