Apple ID says it is locked
Hello!
I was trying to update an app on my phone. When it took me to App Store it had me enter my Apple ID password. I did. It then said that my Apple ID has been locked for security reasons. I don’t know what this means. It had me try to “unlock my account” by entering my password again. But It then said that my Apple ID is not valid or supported. I don’t know what to do. But I can’t get back into that app until I update and I’m not sure what’s making my Id not valid? Any assistance would be wonderful!