Domino TDP "Return Code is 804 Error"

I am documenting this error here because I can never find this on a web search:

Error was found in domarch.log

Return Code is 804
Current date is:
Sun 03/08/2009
Current time is:
08:01 AM

IBM Tivoli Storage Manager for Mail:
Data Protection for Lotus Domino
Version 5, Release 4, Level 2.01
(C) Copyright IBM Corporation 1999, 2007. All rights reserved.

ACD0053E License file (C:\Program Files\Tivoli\TSM\domino\domclient.lic) could not be opened.

Return Code is 804