If u have the backup try to update and look if you have some plugin conflict.I did not change the server files and script files, when I download previous versions of the script they work, when I download or update to this version there is an error on the main page
Generally before updating for my procedure is: I deleting install folder , uploads, confing.php, plugins folder , after overwriten files and after lunch example.com/update.
Reacted by: