Just to inform. If you have password protected the node-defined HTTP endpoints (httpNodeRoot), or the static content (httpStatic) in settings,js, the node will fail in it's attempt loading the model
If you change the default setting and add the user:password combination you have used in settings.js like below, the model will load
If you have secured it with certificates etc etc (https) I don't know how it should be configured or if it then is possible or not