Updating Apple ID Settings

Hi! So I’ve had this problem starting today and it keeps asking me to sign in again cause of some account services that need me to I guess. Problem is is that it’s saying my verification failed and that my application doesn’t exist.

I tried changing my password (which worked) and signing in again cause I wondered if it was just a password problem and then it wouldn’t work again. So I tried typing it slowly and making sure I hit every note, but it still didn’t work. I then tried changing my password again to what I thought I set it as (cause maybe I accidentally had a typo?) but then it said that I can’t change my password to the one that’s already set blah blah blah.

So what is going on???