acornsdev

@filmmaker3000 Yes this is what I had, if I changed the ‘stylesheet’ value in the wp_options table to the backup theme, this fixed the issue of the missing ‘featured image’ but the frontend had the wrong style.

Just some more info for you, as I think your issue is very similar to mine!

@filmmaker3000

Yes sounds like it’s your theme, do you have a parent and child theme? just check these are setup correctly.

Mine had the issue I mentioned, but it’s always been like this, only after updating to WP 5.7 did it affect the site. But my local version was fine and it’s an exact copy of the live site. So I think it’s a mixture on WP 5.7 update and server. May be mu local server is not so sensitive to upper/lower case. No idea but t was a very strange bug, to be fair the same as the other fixes in this thread.

I found the issue, in our case it was the child themes style.css ‘Template’ set incorrectly, the case (uppercase/lowercase) of the string was incorrect:

E.g it was set to ‘Template: xxxx-parent’ were it needed to be ‘Template: XXXX-Parent’

Hello, I’m having this same issue and tried all of the possible fixes in this thread, but to no avail.

1. I do have an index.php file in the theme root directory
2. Tried using front-page.php
3. The jQuery UI version in WP admin is up-to-date
4. I have exactly the same version/n on my local host, how I don’t get this issue

Any help would be appreciated!

Thanks