Unable to Subsribe any Computers

Hello All,
I’ve enabled the OS deployment and Bare Metal Imaging site on
our server, but the content won’t download. It’s hanging forever at
"Waiting for server to begin gather of OS deployment and Bare Metal
Imaging". I see the following message in the GatherDB.log file:

Unexpected exception during gather of site OS Deployment and Bare Metal Imaging: Unexpected HTTP
response: 404
Our server is internet connected, not behind a proxy. We do have
the proper license for this feature. What could be the problem here?
Help is appreciated!