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-6f011aff-6409-4fd0-9b74-e7b881ab39e4",
      "cw-e5f2168b-251d-4ab7-b13f-0c7dd6f56e28"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-2e3eb144-aebc-49b0-9cdd-4b4b25ed5c25",
    "manifestId": "https://dam.iuav.it/iuav/containers/vPWz78Z/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-e5f2168b-251d-4ab7-b13f-0c7dd6f56e28"
  }
}