Site not receiving events in prod

I have a site that uses reverb. Events are working just fine on my machine. However, it doesn't receive anything once uploaded to the dev server.

window.addEventListener('DOMContentLoaded', function() {
  window.Echo.channel('makebid')
    .listen('MakeBid', (event) => {
      console.log('bid');
    })

  window.Echo.channel('closeauction')
    .listen('EndAuction', (event) => {
      console.log('end');
    })
});

Nothing got output to console.

Supervisor is set up to run reverb and queue. The logs aren't displaying any errors from reverb. The queue log is showing events running and completing. Browser is able to connect to the websocket.

What else could be causing this? I don't know what else I need to check in order to properly debug this.