Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/Jvalb5Z/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-c537ebf1-4f20-416e-b927-6bd559c3150d",
      "cw-1b8a0b91-46cc-41e0-bd5d-eec7b01021cc"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-1d5fdba9-6817-492f-9acd-aba6187f8cd0",
    "manifestId": "https://dam.iuav.it/iuav/containers/Jvalb5Z/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-1b8a0b91-46cc-41e0-bd5d-eec7b01021cc"
  }
}