You mentioned 3 things and said: “etc” I was just trying to help, maybe it’s just a Roblox Studio error, or an unsupported, version or OS, still I don’t know.
This sounds a lot like an issue I had in the past called stale wineserver.
you can run flatpak run org.vinegarhq.Vinegar studio kill to see if there is any sort of esync_init that throws a stale wineserver error.
If it is to do with stale wineserver. Here’s the steps I used to solve it:
I uninstalled the flatpak completely.
Remove any instances left. In my case I deleted the org.vinegarhq.Vinegar folder in the ~/.var/app location to be sure there wasn’t any remnant left behind oif the stale wineserver.
Reinstall vinegar flatpak. You can use flathub or install from the flatpakref.
Run the command flatpak run org.vinegarhq.Vinegar -firstrun studio run to go through the updated webview login.
Hopefully this helps. It was annoying to have to figure this out after trying to create an issue about it on vinegarhq github. However I did finally receive enough information to diagnose and fix the problem.