You have a CSP violation on that site.
Looks like your CDN is responding with 301 instead of serving assets:
curl -I https://fpbxforums-sangomaus.netdna-ssl.com/assets/plugins/discourse-canned-replies-33e4732aee5d0bec3cee72adc45b9a5f41c8eaf95bdddb5b4d3026ec6280af09.js
HTTP/2 301
You need to either fix or disable the CDN.