Flarum only works when accessed via the url defined in config.php. When using another URL the API and icons will not work. You should setup redirects so the website can only be accessed via that url, in your case it seems to be https://forum.bloggingzoo.com/ (without www)
Though in your case it seems you have the access-control headers set up to allow downloading fonts cross domain, so I see the icons when I browse both the www and no-www version of your domain (API and therefore any action in Flarum is broken on the www version though, because of the above)
