itch.io

I downloaded the DEMO on Steam : It runs but screen is black

I downloaded the DEMO on itch : Same problem

I LITERALLY DOWNLOADED ITCH TO RUN IT ON ITCH TO TURN OFF SANDBOXING, AND GUESS WHAT? SANDBOXING WAS ALREADY OFF, YET : SAME PROBLEEEEEEM

AND AFTER THE SECOND OPENING, ITCH STOPPED WORKING 

WHAT DO I DO?!??!? q-q

I even tried to deinstall, reinstall, on all version, even tried reinstalling and deinstalling itch, and itch still doesn't wanna work..

Is there a support team somewhere for problems this weird please q-q