Site Health Generating 404

I can’t reproduce this on my end. Which URLs are specifically reported as 404?

One example includes: https://www.cleanairbmore.org/wp-admin/site-health.php

This is the tool itself. Where do you see the 404 events? In the access log from the server?

I see them when I view the page. I get a 404 page.

Nobody here can understand that because we don’t have access data to your backend (and we don’t want to have them). Since I am redirected to the login when I call the link, the file seems to be available.

Therefore, I would guess that something is wrong in the cache of your browser. Try it in a private window.
Or you have a security plugin installed which denies you access. Deactivate this plugin and try again.

Appreciate all the help. Attempting this is a private browser and deactivating WordFence did not resolve the issue. I get no log errors within the WP file structure. If there is another place to look for an error description, I welcome the suggestions.

I get this error on all of the WP sites on this server, so I’m thinking there is some other general limit/restriction being hit.