I had a similar issue with the Big Fish Game Manager a while back where none of my games would launch. In my case, it turned out some of the game files were corrupted after an update. Reinstalling helped, but I also used a file tool on my Android to inspect and repackage certain APK-style files for testing. If you’re comfortable working with app files, something like MT Manager can be useful for checking archives and rebuilding packages. I found a detailed breakdown of its features here
https://mtmanagersapk.com/ might help if file integrity is the issue.