“You are not a member of the Administrator group”
If you are trying to set up a new iPhone or iPad device, you may come across this obscure error. It happens because you may have tried to create an Apple ID during the initial set up or on boarding. (Personally I skip this step. I use a different Apple ID for iCloud and iTunes accounts.) While you are setting up a new Apple ID, you are asked to enter a valid email address. However before you can use the ID you have to verify that you can access the email account. Apple sends a verification email.
After you have tried to use your newly minted Apple ID to make a purchase without verification, you will get the “You are not a member of the Administrator group” error. Check your email and respond to the verification. That should solve the problem. You may also need to go to a desktop computer and search from MyAppleID and finish the verification.
There is one more thing…
When you do go to make your first download (even for a free app) you will have to enter your credit card information.