Can't click in game and tried everything. Please help

My league client was acting normally in lobby and champion select, but when my game started I just couldn't use my left or right click. I thought it was just a glitch, so I exited my league and re-logged and it still didn't work. I had to sit there the whole game and watch my team lose. After the game, I tried everything to fix it, such as restarting my computer, trouble shooting the client, installing the game again. I searched online and most people were saying to turn off your overlay on discord, but that didn't work. Please someone help me, season ends in 11 days and I just want to climb.
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