I’m having the same problem. I cannot access either the pages, media or posts page off my dashboard. I can still access links, comments, appearance, users, tool, plugins and setting pages though.
The error I get is:
Error 500 – Internal server error
An internal server error has occured!
Please try again later.
I have deactivated and deleted all my plugins and still no hope. I have also replaced both wp-includes and wp-admin files with the original downloaded version via my FTP client.
I have previously had to add a .htaccess file to the wordpress route directory in order to get rid of the same error around 2months ago. Could this error be something to do with that?
Thank you