App doesn’t start up after updating to iOS 13,3

I’ve updated my phone and iPad to iOS 13,3, now Trails doesn’t work anymore. For a couple of seconds startscreen come’s up and then dies down eg no functionality what so ever.

Why is this happening? Have I paid for a none functional app and lost my money?

Mine still works, but as others have said, the screen goes black and it freezes. I need to close the app and restart it to stop the session.