Help! All of a sudden my Wordpress admin has started showing a 'Error 404 Page Not Found' message whenever I try to update an existing post or page on my site.
Creating new posts and pages works fine.
This happened suddenly last night when I was updating a series of posts and it suddenly started showing this message.
So far I have tried:
- Settings > Permalinks Save button
- Disabling all plugins
- Updating all plugins
- Changing theme
- Deleting all WP content apart from wp-config.php and wp-content folder, and uploading fresh Wordpress install
- Updating Wordpress
I'm not sure what else to try?