Black Screen after clicking launch on patch

Hey , well today morning i installed the new beta client and i was so hyped about it , until the first bug appeared and it was after i click on the launch button , nothing happens except for leagueclient.exe being open in my task manager but it's literally invisible or something , and then i went on my lol folder and i clicked on league client , and it opened but SIKE another bug , its a black screen now , seriously i spent so much money on the game , and riot is still giving us bug after bug , but its okey at least the game is enjoyable , if only u could play it properly , well if anyone has any ideas about fixs ill be happy to try that.