[CLIENT] Cannot join a teambuilder team!

When trying to join a team on teambuilder, everything appears normal, but the orange button letting me Find Group is gone. I can build a team just fine but i can't join a team. I've tried relogging and exited and opening team builder but it seems that this glitch appears at random, and sometimes it lets me join a team. This happens with all champs and not just Olaf.