It's a glitch related to the current Full Marks event, which will go away in a few days. We don't recommend playing the game during Full Marks because it's one of the only multiplayer events in the game. If you or someone else in your FM group gets reported, you may end up getting banned because Jam City can tell whether or not you've been using cheats.Does anyone know how to fix this error? It happens in year 1, after duelling with Merula. Filch some to get Snape and she goes snoop on them to the Vaults. I've tried clearing cache and restarting my phone, but the error still pops up. Would prefer not to delete the data/reinstall, as I do not have progress saved (not due to not wanting, I am just unable to uninstall FB from my phone so I could sign in, sadly).
Full Marks will be over on April 21st at 9PM UTC. Don't log into the game until after that time. Consider joining one of the Discord servers so you can stay abreast of any Full Marks or House Pride events in the future.