Client Unknown Error

This is happening more frequently to me and I don't know the reason. After i log in not even a minute later i get Unknown Errors and the come up every other second. I uninstalled then re-installed and it helped for a while but its still doing it and is really annoying cuz now i cant even queue up for a game without wondering when its gonna so it again. If this has happened to you and have fixed it how did you do it?