You go upgrade your WordPress site using the usual one click upgrade and BAM! It fails. Ugh.
Maybe you’re equipped with the skills to manually upgrade it and you do it, you click the database to update and everything should be good right? Noooo… you had to get this error
“An automated WordPress update has failed to complete”
WHAT? How can that be? You just manually upgraded it and it went OK how do you get this message off?
Fire up your FTP program or log in to cPanel. Find the upgrade folder found inside the wp-content folder and remove it. Then, inside the same folder wp-config.php is found, you will likely see a .maintenance file. Get rid of that too and the error will be gone.