me and my friends are dealing with this issue for couple of days and it happened at the same time. we've tried every way possible such as verifying game files in steam.
Ideas
Same exact issue, appeared few days ago, re-login doesnt work in any way either, accepts the login then gives this error
three days ago when i logedin to my account everything was ok and even i played in firing renge.
but after that this error showed up.