We run a small e-commerce site selling regional deli and organic products out of Munich. Yesterday evening, during a slow period for orders, I ran a bulk update for 4 pending plugins and a theme update from the WordPress dashboard. While the update was running, the browser tab stopped responding for a second, and I got impatient and refreshed the page.
Right now anyone visiting the site gets the message "Briefly unavailable for scheduled maintenance. Check back in a minute." The real problem is that when I try to log into wp-admin, I get redirected to the exact same maintenance screen; I'm completely locked out of the dashboard.
We do about 1,200 to 1,500 euros a day in sales and morning traffic is about to pick up. How can I completely remove this maintenance mode without messing up the database or order records? What should we watch out for when doing updates like this in the future so we don't get locked out again?