Can’t get app to load

My daughter just got the Harry Potter wand for Christmas and we are having difficulty getting the app to work. Installed on iPad 6th gen, software 12.3.1. If I click on the app to open it, I get a message saying “Restricted Site. You cannot browse this page at “localhost” because it is restricted.“ After reading other threads, I thought it could be parental controls, but there are no options to change anything. I have tried removing and reinstalling the app, but nothing changes.