The App Store app is logged out, and logging in with the correct credentials spins for a moment then leaves the app without being logged in.
As of now I'm suspecting a filesystem issue, perhaps permissioning, as I've seen other things that might point that way.
Anyone else seeing this?
Found answer. You have to add at the end of your password the 6 digits code you'll receive in another apple device.
Here it is correctly explained -> https://developer.apple.com/forums/thread/117451?answerId=716214022#716214022