Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/nZbbPRZ/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-13c7c95d-a7db-4aa1-815f-2cd2ae9616d6",
      "cw-f7a369fa-dbf1-4970-b778-9b91d04a5171"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-5fab47fd-d559-4177-b0c4-d4315148ae66",
    "manifestId": "https://dam.iuav.it/iuav/containers/nZbbPRZ/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-f7a369fa-dbf1-4970-b778-9b91d04a5171"
  }
}