Have you tried all of the suggestions in this link? https://www.renpy.org/doc/html/display_problems.html
Yeah I tried all that already.
Then unfortunately I've no idea. :(
Hopefully someone else has some kind of solution, alternatively hopefully the issue is fixed in a future version of ren'py.
Alright, I guess I'll have to wait in the meantime. I just want to say I've enjoyed the game so far, and I can't wait to be able to play it again! :)