Creo HMX unable to load drawing template.

Hello, I am trying to re-flatten a wire harness for a manufacturing drawing that I have been working on but I am getting an error that reads "Cannot load drawing template. Please ensure drawing templates are saved on the first sheet". The template I am using only has one sheet, so it is saved on the first sheet. In the past, the only way I have been able to get around this error message is to create a new drawing entirely. How do I avoid this error? This error occurs in the Creo Harness Manufacturing Extension.