Have you just gotten back to your WordPress after a bit to do some cleanup and maintenance? May as well go ahead and apply the updates…
Oops! The dreaded message appears:
“Briefly unavailable for scheduled maintenance. Check back in a minute.”
What to do? Usually, this just means that you would need to go into your file system structure and from the base of that specific domain, delete the file with the name .maintenance. (The base directory is where you see the wp-admin, wp-content directories.)
Refresh your screen, and you’ll likely see your posts again.
Be sure to check the status of your updates as one of them may have failed.