I keep getting the black screen!

Lately when i try to get into a game my screen just goes black. It gives me a window that says "unable to connect to sever". This happened to my friends so i know it is not just me. i tried uninstalling league and restarting everything from client to computer and nothing seems to work. Ive gotten leaverbuster because of this and i really want riot to fix this. Leave thoughts below or suggestions to fix