Failed to retrieve unattended template

Problem:

I’m trying to deploy CentOS to a server, but each time I get this error:

Failed to retrieve unattended template for {“splat”=>, “captures”=>[“unattended”], “kind”=>“unattended”}: Error retrieving unattended for {:url=>“http://test-server.domain:8000”} from test-server.domain: Net::HTTPNotFound

Expected outcome:

Presumably a template could be retrieved? I don’t know; this has never worked.

Foreman and Proxy versions:

1.18

Foreman and Proxy plugin versions:

1.18

Other relevant data:

Failed to retrieve unattended template for {“splat”=>, “captures”=>[“unattended”], “kind”=>“unattended”}: Error retrieving unattended for {:url=>“http://test-server.domain:8000”} from test-server.domain: Net::HTTPNotFound