Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/vPWlpnZ/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-0444a8f0-a4ed-49b3-acf5-01f19d8437a8",
      "cw-cfa6505f-9664-4082-ad33-4ef7d440b711"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-bac99640-340c-4234-99e0-7fc5e001f5f3",
    "manifestId": "https://dam.iuav.it/iuav/containers/vPWlpnZ/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-cfa6505f-9664-4082-ad33-4ef7d440b711"
  }
}