[CLIENT] Cannot play or join after a game

Hi. For the past few days i've been experiencing an issue related to creating/joining game lobby after a game. I have to restart league of legends couple of times to play again. Basically after a game, my Play button goes grey, and when someone invites me there's no accept button, just "please wait..." ... I don't know if it's the right place for this post, but please dont hate. Looking for answers. Thanks.