[Hummingbird Pro] Font loaded from CDN is forbidden 403

I get the following error when trying to load a few font resources:

Access to font at ‘https://hb.wpmucdn.com/fonts/fontawesome-webfont.woff2?v=4.3.0’ from origin ‘https://www.drsajonia-coburgo.com’ has been blocked by CORS policy: No ‘Access-Control-Allow-Origin’ header is present on the requested resource.
Could you add the Header Access-Control-Allow-Origin * to your CDN? I’m sure I’m not the only one with this issue.