Player has no skin, just grey rectangles
I've followed the instructions to set up an audio embed, and I get two grey rectangles with numbers in between them. There are no controls visible, but the left grey rectangle appears to be play/pause and the right rectangle appears to be mute.
Here's a bare example:
The mp3 file plays fine, and there's dozens of PNG files in the network activity log, no errors in there or in the console.
I have looked at this in: Linux: Chromium and Firefox, Windows: IE 11, Firefox, Chrome. All of them show the same thing.
I have also tried with a video and poster image -- the poster image does not show, and the same two grey rectangles are there instead of the control bar.