I have strange situation which just started which I seem to be unable to resolved. I am not sure what this might be related to but I think I remember reading somewhere that this has happened to someone else.
Upon logging into WordPress then going into the menu management area, then clicking on "screen options" and enabling the view of a menu metabox for a custom post type that was created and then adding a page from that post type to the menu the menu management area started showing a Internal Server Error 500 message.
Every other area of the website and admin area works perfectly except for the menu management link. I have attempted everything I can think of in an effort to resolve the problem including removing every plugin and customization made to my
functions.php file however I can't get the issue resolved.
I was hoping someone here might able to help me resolve this issue or suggest anything to diagnose this issue.
Any help is greatly appreciated!