When attempting to add a link through the user interface, the following error appears:

Internal Server Error
The server encountered an internal error or misconfiguration and was unable to complete your request.
Please contact the server administrator, webmaster@pm-systems.com and inform them of the time the error occurred, and anything you might have done that may have caused the error.

At the present time I do not have sendmail setup, is that causing this problem? Also, I have changed the path for the built pages, but that function is working correctly. Please help. Thanks!