App Store - Authentication Failed

Hello all,

I am not able to lo gin to the app store.

If I go to settings, my ID, I am logged in and using iCloud fine. It's just App Store that doesn't seem to work.

When I try to manually log in to the App Store, I get Authentication Failed message.

Any ideas what could it be?

I have changed my Apple ID password, log out and log in again, and restarted my phone.