Since last few days, every time I try to update and existing post or page, I am being redirected to the 404 Error page of my site with the message at the top bar "Nothing found for Wp admin post php".
I have checked the permissions of all the files and folders and they are the same as before. I have checked with my hosting provider for any hack attacks also..none.
This has left me confused and ipset for the last few days as I there are any pages that I want to re-work on, but can not.
Moreover, when I try to update the PHP files from the theme editor section, it shows me the 404 Error page. All the theme PHP files are writable.
What can be the issue here? It would be great if someone can offer a solution. The strange thing is that I also have another WP installation in a sub-directory, which seems to work fine.