Unable to view uploads

I’ve installed this, and after a bit of tweaking, I have it working so that it will successfully upload files to my Azure container (I can view them in my Azure dashboard).

The problem I’m having is that I can’t see the files in the WordPress Dashboard at all – they all show as blank grey boxes in the media manager with 404 errors coming through in the developer tools.

I suspect that this is because it’s not designed to work with private containers.

1) Is this correct?
2) Is there a workaround for this? I see a deprecated function ‘createSharedAccessSignature()’ that looks like it’d be useful, but it isn’t called from anywhere.