Cannot render app when in remote Jupyter Lab

[chrothenbach]

I am running JupyterLab on a remote server, and accessing it via the browser on my machine. When I try to run a JupyterDash app, I get the following error:

OSError: Address 'http://127.0.0.1:8050' already in use.
    Try passing a different port to run_server.

I tried passing different ports (unused ones) and still could not get it to run in inline or external modes.

[chrothenbach]

But wait, i think I figured it out. I changed the arguments in app.run_server():

app.run_server(mode='inline', host='host_name', port = 8066 )

I guess it explicitly needed the host name or IP. I'm closing this myself, but would be good to provide that info in the readme.