I’ve downloaded the new version of the app and although you can log in, as it tries to display the Home Screen, the app crashes. This occurs on iPadOS 14.4 (on an iPad Pro) and iOS 14.4 9 (on an iPhone 11 Pro). I’ve still got the old version of the app on the iPhone and this works.
I get this too, if I uninstall it and then re-open and register my Virgin Mobile account that works, but when I then try to register my Virgin Media account it tries to take me to the login page and then just crashes, can't then open the app after this without i crashing.
Had been working for a while not sure if the app updated.
Thanks for getting back to me @prometheus76 . So it is definitely IOS that it's having an issue with. I will feed this back on your behalf. I am genuinely sorry for any inconvenience this may be causing you.