Error retrieving glyphicons-halflings-regular.woff2 on successful AJAX call from jQuery

Using IIS I fixed it inside the Web.config-file, add the following inside <system.webServer>:

<staticContent>
    <remove fileExtension=".woff" />
    <remove fileExtension=".woff2" />
    <mimeMap fileExtension=".woff" mimeType="application/font-woff" />
    <mimeMap fileExtension=".woff2" mimeType="application/font-woff" />
</staticContent>

Notice I remove the extensions first, in case they already exist.