Buttons missing from media player

I’m getting a weird error in that the buttons are missing from the default media player.

I get this missing file in the javascript console.

https://www.hyam.net/wp-includes/js/mediaelement/controls.png

controls.png has been removed from core but it is also weird in that the path is not right – it doesn’t allow for the subdirectory hosted blog.

I’ve done a automatic and manual update of core – now on version 4.9.4

I’ve done automatic and manual updates of Awaken – now on version 2.1.7

If I switch to another theme (e.g. omega) the buttons come back and it works.

I’ve grepped around in the code to look for references but it would be quick for someone who knows what they are doing to take a look!

Love the theme and have recommended it to others. This is the first issue I’ve had with it.

Many thanks for your time.

Roger

The page I need help with: [log in to see the link]