Basic message_bus gem setup on Rails 5.04

Question

I'm attempting to setup MessageBus gem ( https://github.com/SamSaffron/message_bus ) on a fresh install of Rails 5.04

So far I've

1. run bundle,
2. added message-bus.js and included it in the application.js
3. created an initializer
4. ran a rails scaffold generator
5. started a client in request.js that is subscribed to /TestChannel

When I go and test the app, it looks like the client is polling (based on the server logs), however, when I try and send a message in rails console, the client does not receive it. Yet per the server logs, it appears to attempt to send it.

Example:

Rails Console:

MessageBus.publish "/TestChannel", "hello" in rails console

Server Log:

=> Delivering messages [] to client e4ac8e6cfeb340a8a389468bf0536053 for user (chunked)

Browser: Nothing triggered.

Any help getting the client to trigger would be appreciated.