So I noticed that there was an update for oQueue, today, installed it, did everything I'd normally do when installing an addon.
Login in, go on my Monk, try and find a Celestials group because I haven't done them yet. Get into a group, and before I can even say hello I get instantly removed from the group. Naturally I get a little confused and try again, with the same group. I get in again, then instantly removed. I try a different group, same thing happens. I try a different character, same thing happens. I just wanna get these bosses down man.

I have same problem and dont know what fix it.

there is a conflict with other addons that auto-accept group invites. 

elvui and tukui have such an option on their general tab.  turn that off and you should be ok.