Can anyone help me to fix that error pls?

I was started the realistic ground battle normal and I have this error

You need to fix EAC…

Firstly, you want to check the launcher if you use the gaijin launcher, and just above the play button is an EAC option, that should be on.

image

If that doesn’t fix it, then you either need to make the exception in your antivirus for the game folder, or run the EAC setup in the EAC folder in the game folder as administrator, and repair service.