hmm... it could be a couple things. what kind of error are you getting?
When I try running it in the itch launcher, it just says the game couldn't be started. When I ran it manualy, it said that I don't have enought permissions to run it (or something in this direction).
If you want the error report from the itch launcher, just tell me where to send it.
oh hmm, i don't know anything about itch launcher stuff, maybe it has a problem with rpg maker games in general? is there a way to find the game folder on your computer and open it from that??