Can’t use Apple ID on iPad

Hi maamajama,

Thank you for using the Apple Support Communities! If you're experiencing an issue with your Apple ID, the guidance in the article below can help:

If you can't connect or sign in to iCloud

For example, as noted in the article:

If you get a message that your Apple ID is locked or disabled

If you or someone else enters your password, security questions, or other account information incorrectly too many times, your Apple ID automatically locks to protect your security and you can't sign in to any Apple services. Learn how to unlock your Apple ID. 

Hope this helps!

Have a great day.