TechSmith Relay (Self-Hosted): Error "2104 An error has occurred" when attempting to open the Caption Editor.

Attempting to access the TechSmith Relay Caption Editor results in an error message of:

Code: 2104
Category: InitializeError
Error Message: 2104 An error has occurred.

This problem will occur when the 'Relay' web site does not contain MIME-Type setting for Silverlight. Please review this articlefor additional information about configuring Silverlight MIME-Types in IIS. Please note that the MIME-Type change must be applied at the virtual directory containing the Camtasia Relay site (/Relay).