FaceIt Anticheat forbids me to launch CS:GO

When I’m activating FaceIt AC, I can’t launch CS:GO, I launch it and see the “synchronizing” sign, but then it says that CS:GO is not launched. Tried to launch it without AC, everything worked.

I’ve been having the same issue. Faceit AC enabled, all good, try to launch CSGO. Screen flashes black, then right back to the desktop as if it never was launched.
I uninstalled and installed CSGO again, and the same with faceit client and anti cheat. Let me know if anything works for you.