HTTP 520 Errors when opening a post or a page to edit.

I have a site that has been using the Enfold theme for a couple of years. It’s been great. Just recently, though, whenever I click on the “edit” link for a post or a page in the WordPress admin area, I get a 520 error.

The only thing that that might have changed since it was last working is possibly hiding one of the Enfold theme blocks in the “Screen Options” menu of the post/page edit screen. I want to say I hid something that started with “Avia” just because I never made changes to it, and maybe that caused it? Is there a way to reset that view setting somehow without being able to load the post/page edit pages?

I have no new plugins. I tried updating to the latest Enfold (by first completely deleting the old one) and it still does not work.

My front-end works fine, pages and posts still load. But, the backend post/page editor gives me 520s.

I have three other WordPress sites on this same server that are all working fine (different themes). I also tried temporarily activating another theme on this site, and that allowed me to get to the edit pages. So, it is something Enfold-related.

Nothing seems to get generated in the WordPress debug.log (when debug mode is enabled) or in my NGINX or PHP logs that are related.

Any ideas? Thanks!

• This topic was modified 7 years, 8 months ago by bballhermit. Reason: fix spelling typo