client black screen

LITTERALY what the title says, what in the world are they touching in the source code, last night client was working now i have to restart my pc EVERY single game so i can see the client?

i went to the task bar and the client is running but its not showing on my screen EVEY SINGE TIME!!!!

both the league client and the riot client, i still dont know why they made 2 insteed of merging them.........