Same here.... Looking for a solution... So far it looks like its just a problem for steam users...
Update: Reinstalling battle eye using the steam option doesn't work... Also verifying the game cache doesn't work... I tried joining other servers with battle eye enabled, and the same problem pops up... I could only join servers with no battle eye enabled... Nothing comes up to tell you why you cant join... The only reason i knew it was battle eye, was because the admin told me the reason that showed up for him....
I could only join servers with no battle eye enabled...
Looks like this is a problem for steam users only...