[Smush Pro] Smush CDN not working

Hi, I had a previous issue with the smush CDN not creating images so I ended up with broken image links on the site. You fixed it by saying that the site wasn't properly connected and you re-activated it to get it working. The same issue is occurring with another site. It's a local install running through MAMP Pro – is that why your image CDN won't work? Thanks.