Today morning, i face one error in wordpress after updating one plugin. which is “Briefly unavailable for Scheduled maintenance. Check back in a minute“. The same error occurred few weeks back but i didn’t pay attention there and resolved automatically next morning. But this time it was necessary to resolve, as i had important work to do.
There is very simple tweek, to resolve this error,
Go to Cpanel or any ftp client and open file “wp-settings.php“.
you will find below line :
// Check if we're in maintenance mode. wp_maintenance();
Simply comment that line :
// Check if we're in maintenance mode. // wp_maintenance();
After commenting above line, your wordpress site will run just fine.
To read more about this error, refer this URL.