Hello,

No, that was not an automatic response. However, when you face such a problem, the only solution are the steps I provided, they are common, so you could see the same message to other users, which had “PCLZIP_ERR_BAD_FORMAT (-10) : Unable to find End of Central Dir Record signature”.

You need to update once manually, after that you will be able to update automatically. If you have any problems or need help, make the full backup of your site and provide FTP details as well as your site admin access, we shall help to update.

Best Regards