My b2evolution Version: 3.3.1

There is a directory that shows in the file manager but when you try to open it you get an server error 500 screen.

I can view the images in the browser using the full url.
When I try to ADD/LINK images from this directory to a post I get the server error 500 screen.

I've repaired the DB in cpanel.
I've changed the media default directory using the full URL.
Nothing works.

Any ideas?
Kathy