I need help fixing the client

I re-downloaded LoL about 3-4 times but when I open the launcher and click play, this screen always appears. Is there a way to fix this? Please help ;-; -> I have already made another admin acc on laptop but LoL still does not work on it -> [~removed to protect private information~] -> I have allowed the program through firewall -> I redownloaded adobe flash player and adobe air
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