The problem is renpy, not CoR, has been updated and you need to do a clean install, remember to back up your saves
Go to Android/Data/com.zimon.chamoionofrealms/files
and copy the save folder
If you are on Android 11 or greater and you cannot see this file, you will need to download a file manager from the app store that has been updated to support the new permissions introduced in that version. (Zarchive is known to work)