Your account is locked” MacBook air
At startup, after entering password, get message : “Your account is locked”
restarting with Control-R go to same screen and message.
To recover from an Apple ID / iCloud Account that has become disabled for whatever reason, please read the following: If your Apple ID is locked or disabled - Apple Support.
You may need to wait a day or so before attempting to log in again: If you see an 'Unable to sign you in to your Apple ID' message - Apple Support.