Hi TippyT,Did you make sure to put the "aapt" file in the same directory as our game files?
What device are you using, this happened to me with a different game on a budget device.
Did you sign the .apk file using the app "ZipSigner"?
Ingreidients--------------------- Android Phone(or tablet) with "Unkown Sources" feature- PC Version of Undertale - Windows or Mac Computer- DETERMINATION
Automated Instructable Views and Favorites Checker
Playing the Imperial March from Star Wars on Raspberry Pi with Piezo Buzzer