Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/vPWz78Z/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-cc562d00-8412-49d1-ab8d-09673f63dffc",
      "cw-de670dff-68b5-4df1-8ca3-9a1f699a9269"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-39e09ddb-1375-444d-a9ad-019298fea01e",
    "manifestId": "https://dam.iuav.it/iuav/containers/vPWz78Z/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-de670dff-68b5-4df1-8ca3-9a1f699a9269"
  }
}