Cannot Convert Adult Account to Child Account - Server Error

I tested changing the birthdate to a non child date, and yes, it successfully changes. I then waited a few hours and attempted to change it to my child's birthdate, and receive the same error. I get the message that the family organizer will receive the approve request email, but I no longer receive that email. Logging out and then back into the Apple ID (via web browser) to see if the change request is still pending and its not.

Also worth noting - I attempted these changes while being signed out of iCloud on my child's iOS device (though still part of a family) When I sign back in, and select "Name, Phone Numbers, Email in the iOS menu, the Birthdate is is the newly requested child's birthdate and lists a note below reading "Pending approval from Family Organizer." Perhaps an original request pending status has never been cleared?.....Very Frustrating

Does anyone have ANY ideas on what I can do to resolve this "Sever Error"? I can't even create a new Childs Apple ID from the Family Sharing menu in IOS because of a constant error loop of not being allowed to accept the terms and conditions.

Have tried on multiple devices, on various different networks for over two weeks. Both Apple support sessions have resulted in escalation to senior techs with no resolve.

No, I have not tried to change the birthdate to an adult as the Apple ID is already an adult account.

I have attempted this this change from both a Mac, iPad and and iPhone and receive the same error every time.