I recently came to this error while trying to play some aram matches. I first started my launcher and this error would say:
jpatch.exe - Application Error The application was unable to start correctly (0x0000005) Click OK to close the application.
Now, i restarted the game and this error disappeared. But when I tried to start the game, the same error, although this time on league of legends.exe started showing and would send me back to the launcher all the time.
Does anyone have any idea how to fix this? I tried using the repair tool and re installing and no luck.