Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/pvlKX3Z/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-5f9de793-bb93-4426-8be1-80c8bf4c86fd",
      "cw-d4862f87-7453-45bb-84db-6c9370667fd1"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-4cc82d76-93b7-4fa4-bd6a-f67fc21d7b42",
    "manifestId": "https://dam.iuav.it/iuav/containers/pvlKX3Z/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-d4862f87-7453-45bb-84db-6c9370667fd1"
  }
}