WebSocket closed before the connection is established

I’m following the quickstart guide and when I try to run and test it I get this error:
convergence.esm.js:863 WebSocket connection to ‘ws://localhost:8000/api/realtime/convergence/default’ failed: WebSocket is closed before the connection is established.

what am I missing?

Do you have the container running? Are you able to log in to the admin console?

yes, the container is running and I was able to login to the admin console

Gotcha. What operating system are you using. And if not linux, how are you running docker? When you log into the admin console do you connect to localhost?