CoreGui Scripts Throwing Errors When Playing on an *Unpublished* Place

Replication Steps:

  1. Create a new place (make sure its not published to your account or any group!)
  2. Open “Test” tab at top of window
  3. Start a new local server with two or more clients.
  4. View output

Expected behavior

After following these replication steps, you’ll likely see an output filled with errors.
While it doesn’t occur every time, it happens more often than not.
Once triggered, this issue renders much of the CoreGui completely unusable.

I have a ticket in for this, except it happens on a published game as well. It won’t be public, but it will be published. I hope it gets fixed soon.