"The editor has encountered an unexpected error."

That ok, still working to resolve your issue! The problem is, all your same components are working fine in my test area! Just checking/experimenting as linux has many sorts of permission issues.

(100% WORKING SOLUTION): Hi! The problem you’re facing is actually caused when you update some plugin or your WordPress core software, but your browser is still getting served the old invalid cache files. Even though the WordPress caching plugins do not usually serve cache to logged in users, but your CDN (like Cloudflare) and your host do serve the old cache. Even your browser stores some of the old and invalid cache.

Thus, to fix this issue, all you need to do is, delete your site’s cache from all those places, that is, from your browser, your WordPress caching plugin, your CDN and from your Host. That will surely fix the issue. You can check out the detailed article that I wrote. It is very easy to follow and will surely solve your issue. Here’s the article: (FIXED) The Editor Has Encountered An Unexpected Error WordPress

No, it is not a spam.

Sad to hear that it didn’t work for you.

It worked for me everytime so I thought of sharing it here keeping in mind the helpful community of WordPress, tried being a part of it.

Maybe you have some have corrupt plugins installed. Otherwise this should have solved the issue.

If that’s not the case, I would suggest you to repeat those steps. Perform each one of them. Skipping any 1 of the 4 steps will not do any good.

Best of luck! 🙂