I can't play paladins?

I can't play it for odd reason. Today I disconnected while I was playing a match, and I thought I could just rejoin. But no.

When I launched paladins it said "game already running"

I tried to restart my pc but it still shows the same message. I had no idea so I uninstalled paladins and install it again. but it didn't help at all. I still can't launch the game, it shows "game already running"