This issue was also present in the mod, and I'll do a full write up of it here.
Firstly, this issue was not present before Battleye was added to the standalone in one of the last updates.
Whenever I join any server, i will be able to play for up to maybe 2 minutes, before i get kicked for "Battleye Client not responding"
I've done a whole lot of research on the issue, and discovered that several people all get the same problem. The thing that connects all the errors is that everyone has a BobLite or Bob2 router (genius Lite or Genius router)
The problem has something to do with the modem being incompatible with Battleye.
I have tried every available fix, from re-installing Battleye to getting a new modem from my ISP.
I couldn't play the mod, and now i can't play the standalone, and everyone with the same problem would agree that it's incredibly frustrating. Especially because I paid $30.