FF7 is already running...

[kjxxxx]

The game is on Steam. The latest release 7th Heaven Canary. Mods installed according to the guide (the 16 best mods for 2026). Everything was fine for a few days, but since yesterday, the error shown in the picture has been popping up. I have no idea how to fix it. Do I have to reinstall and re-configure everything?

I didn't change anything, I didn't install anything new, I just turned on the PC and wanted to run the game...