I don't find the link to download , where's it please? Also i would know if the under world work in there or not ... Do i need to root my phone to do this steps ?
And if you did it, try to check what kind of files you removed? Remove the one that is called "users.xml.hash" and rename "users_backup.xml.hash" To "users.xml.hash".
If still not working please contact me at discord, my discord username: 69someone_ Add me there saying "sf2 bug no work" and I'll try my best to help you get the mod.