Arma 3 Shaders Not Valid Patched ((link)) Here

: Stale data in the local profile folder can prevent the game from recognizing valid shaders. Missing Files

and navigate to:

See you on the field, soldiers

Have a different fix that worked for you? Let me know in the comments—this error evolves with every Arma 3 update. arma 3 shaders not valid patched

Now go forth, soldier. Your shaders are valid again. : Stale data in the local profile folder