Need to restart the Online Player Once (on MAC)

Seems like on the MAC Online Player first time install you just have to:

  1. Run it
  2. Shut it down
  3. Run it again

…to get past the start up screen. Then everything is fine and dandy.

In my testing, the problem occurs when macOS asks you if you are sure you want to open this file (because it was downloaded from the internet). That seems to interfere with the initial connection to the server.

If you keep running the app from inside the DMG it is packaged inside, macOS will keep asking and you will keep having connection issues.

If you drag it to /Applications and open it from there, you should only be asked once to allow it.