Can you send us a screenshot of the error? And what would help us immensly is the save file right before you get a crash, here's where saves are stored on Android:
1. SD:/Android/data/[something with academy in it]/files/saves/
2. [Your local storage]/Documents/RenPy_Saves/[something with academy in it]
Upload it on any cloud site that suits you (for example Mega or LimeWire) and send us a link!