NPE thrown when calling _cmsinternal rest service

<@hst.link var="myLink" path="api-manual/EventsDocument/" />

<script>
  const url = '${myLink}';
const request = async () => {
    const response = await fetch(url);
    const json = await response.json();
    console.log(json);
}

request();

</script>

      if (mount.isExplicit() &&  mount.getHstSite().getChannel() != null &&
                (resolvedSiteMapItem == null || !resolvedSiteMapItem.getHstSiteMapItem().isContainerResource())) {