Error: 'Response status code does not indicate success: 401 (Unauthorised)'

Cannot complete the data import due to the following error message:-

Orchestrate data flow has failed. The detailed information is as follows:

Response status code does not indicate success: 401 (Unauthorised)

Import command:

N/A

After running an FactoryMaster copy live to play, the API integration lost links between FM and Orchestrate. Please raise a new case online and reference the title of this article.