Quote Originally Posted by clydejones View Post
I downloaded the html_output files (both)

That will only correct the issue on the catalog side but it will mess up the admin side.

You need to install the (admin) html_output.php file from the latest security patch.

Do that and I believe that this issue will be resolved.
The just uploaded that file and it allowed me to edit the Links Manager options. However, I still cannot edit a link or add a new one.