I’m experiencing the exact same problem, it used to work by refreshing the app multiple times but not doesn’t work at all. Your not the only one with the problem.
Have you tried downloading Testflight fromthe link above?
Yes, the same thing happened again. It told me that the app had crashed and if I wanted to share this information with the app developers so I have.
Ok I have iPhone and it’s running latest iOS and it is working fine