WoW Companion App

I don’t know if this is exactly the correct place to put this but:

I have installed the WoW Companion App on my Motorola Moto G Pure which is running Android 12 from the Google Play Store and all I get is a blank parchment screen after the Blizzard logo. I have the app and the authenticator also on the phone and both of those work fine.

Is there anything I can do to be able to use this app and if so, what is it?

Here is what I see: