how much storage space do you have? If you near last 10 gb you start getting file corruptions. You'll need enough free space for both the zip + the unzipped and still 10gb free after that.
Also just to confirm, you got joiplay from their patreon yes? The latest version on appstore is like years out of date
You may just want to completely uninstall joiplay, renpy, and make sure to delete any folders related to them. Then reinstall. I had to do that a few months ago --- qlthough my issue was that nothing started at all, not that it was bugged once open