[CLIENT] Kicked from teambuilder when game starts

I get a message saying an error has occurred while trying to start out game please try again later whenever I play team builder (I've only played as vayne so far since this has happened) and it happens every time I try to play a game in team builder(Which was twice until I solved it).

I Tried to solve this before I took a pic so I don't have a pic. I just restarted client and it seemed to solve the problem. If it happens again Ill get a pic of it

1. Click play
2. Choose Vayne(Just to be as accurate as possible)
3. Choose Bottom and marksman
4. Once in a group and the lobby is full click ready
5. After everyone is ready and captain starts the que wait and the message will pop up