I'm already logged in on my Mac with my Apple ID. When the App Store asks for my Apple ID before getting a new app, I enter it correctly and have no wrong password errors.
The odd thing, is that when the App Store asks for my login, it auto-fills the email of a family member who has a secondary profile on this computer.
However, instead of getting the app, it just shows this alert which has no place to "enter them here" as it requests:
If I click "Get" it just shows the notification popup over and over for three times then the process stops.
What's wrong with my App Store connection?