We dug into it and looks like a possible error with the way that Gulp is processing the ratchet-mod file? The issue is that it's treating this as a URL instead of a data URI. I attempted to add a transparent pixel in the same directory, but that did not fix the problem...
The error in the console... GET http://localhost:8000/css/ratchet-mod/data:image/gif;base64,R0lGODlhAQABAIAAAP/wAAACH5BAEAAAAALAAAAAABAAEAAAICRAEAOw== 404 (Not Found)
We dug into it and looks like a possible error with the way that Gulp is processing the ratchet-mod file? The issue is that it's treating this as a URL instead of a data URI. I attempted to add a transparent pixel in the same directory, but that did not fix the problem...