Livicons doesn't allow cross-domain fonts
If you will open the Frest Admin Template directly i.e(file:///C:/Users/abc/frest-admin) in Browser without localhost or link url, you will find broken font-icons. It is due to Livicons doesn't allow cross-domain fonts.
Open the Frest Admin Template html files from the localhost i.e (http://localhost/frest-admin/) or link url (http://example.com/frest-admin/), it will work fine.
Another solution is to use Base64 Encoding Web & Icon Fonts in CSS