Apple Music won’t launch on iPad

The Apple Music app on my iPad (Pro, 5th Gen) won’t launch. It appears to start launching then nothing happens. This started at some time in the last month (I don’t use it often!). I have tried restarting the device and deleting and re-installing the App but it still doesn’t work.

I also get a can’t use message when I try to make calls via my phone on Face Time, it says it needs to be connected to the same account - but as far as I can tell it is, all the details are the same on all my devices, and all the other Apps including Apple TV work fine on the iPad.