The target location you specified is not supported by the report server

I was getting another obnoxious error message with a reporting services report in my SharePoint site. This one won't win me a Nobel prize, but figured I'd type it up anyhow…

This is the error I was getting:

• An error occurred during client rendering.
  • The target location you specified is not supported by the report server. A report definition (.rdl), report model (.smdl), resource, or shared data source (.rsds) file must be located within a library or a folder within it.

Well it turns out it was because I was fooling around with the actions on a placeholder within the report designer itself. I wanted the Title field to be clickable and when click it would send the user to another URL. The problem is I put the server name/port number in the url when it requires a host header instead. Notice my expression with the server name and port 82 in it:

This apparently doesn't work and causes the afore mentioned error (for me anyways). When I changed the URL to something like http://reports.contoso.com/ it worked just fine.

Phil