If you have used Rustici Engine for a while, you may remember the old 5 question mark trick (?????) to pop up a debug log. This was removed in more modern versions of browsers and replaced with an alternate way to open up debug logs while having a course launched.
1) open the browser dev tools console
2) make sure the frame it’s referencing is the one that contains the player page (not the content) -- there’s usually a drop-down at the top left of the console that specifies this
Debug.ShowAllAvailableData() and hit Enter. This should bring up the window.