activation error

Hi, I have been trying to upgrade to IOS 12. The iPad Air is asking me to activate it and when I hit Activate it comes up with the message "It may take a few minutes to activate your iPad" . After a few minutes I get "Your iPad could not be activated because the activation server is temporarily...

I am grasping at straws trying to get my iPad2 straightened out after the original ios 9.3 update. I updated my iPhone 5S with no problems at all. When I updated my iPad2, it got stuck on the activation screen at the point where I was instructed to Activate using my AppleID. When I type in my...