Occassionally WordPress has a hiccup while doing plugin updates, and you’ll see a message that just won’t go away:
Briefly unavailable for scheduled maintenance. Check back in a minute.
This typically happens when you navigate away from the plugin update page during the update, which prevents the plugin from being completely updated.
The solution is simple: delete the
.maintenance file in the root of your website. You can do this using the
rm command (remove, or delete) in the terminal:
That’s it! You’re done!