How can i check my macos

What macOS version are you running? You'll need Sierra or higher in order to login with an Apple ID that has 2 factor authentication

If it is an older macOS version. please get a verification code from one of your trusted devices settings in order to sign in

Have you already tried waiting a while, then retrying the operation that failed?

Sometimes messages like that mean that a server is down … but that if you wait long enough, someone will get the service running again, and then new attempts will go through.

Mitch, that Mac has been affected by some "cleaning" product:

Uninstall it. Those things are scams.