Fix for error "there was an error processing message" and champ select "null" and cant talk

I had this error that this error message "there was an error processing message" would pop up if i made a ranked or normal lobby. And when i got into champ select my clan tag would be null and i couldnt talk in chat. I noticed i was not the only one who had this problem.

What i did to fix this was:

1: In launcher i pressed the cogwheel and unchecked peer to peer transfer ( i dont know if this helped but thats what i did)

2: I pressed the question mark and repaired client.

This fixed the problem for me atleast and i hope it will for you guys too

Sorry for bad english :)