Hi. I’ve just managed to restore my client’s website by reverting it to a backup from before the latest Wordpress update. And in the process learned about the issue and that it’s linked to the theme. Now as I understand it I need to update the theme before installing the Wordpress update to fix it. Only problem is that my coder failed to install a child theme back when she created the site, so now I’d lose the customizations made to the site if I update the theme.
So I’d like to know if there’s either a way to fix this issue without having to update the theme, or if it’s possible to update the theme without losing the customizations. Losing them and having to redo everything would be the last resort, so it would be nice if you could offer a better solution.