swagger-ui.html wont load outside of node-red editor

I am having difficulties accessing the Swagger HTML outside of the node-red editor.  I am on a closed network running node-red in a docker container.

Within the right-hand Swagger panel (inside the editor), I can see everything perfectly.  When I try to access:  `<url>/swagger-ui/swagger-ui.html` all I see is a blue alert that starts with "I see you're lacking Swagger doc..".