PBE closes after some seconds being open

After the update that came after Yuumi's PBE launch, my PBE started closing after starting. It enters the client for around 6 to 3 seconds of being open, and I don't know what to do. When Mordekaiser's patch came, it didn't close, and allowed me to do the restart for the update. I have another bug I can't fix, that is when every time I open and close League, I have to restart my computer to reenter League. I restarted it, and tried entering PBE again, but it started closing again. I can't use the hextect repair tool because it doesn't launch in my computer for some reason. What do I do? Also, additional info if it might help: my computer is a old MacBook Air, OS X, Version 10.8.5, with a 1,8 GHz Intel Core i5, and a 4 GB 1600 MHz DDR3 memory. it was made mid 2012. [cass-cry] Edit: Welp, after posting here, things got worse. Now my normal League of Legends doesn't open. I can't access the game in any way if not by posting through the site. What do I do?