Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/ZnkO8Lv/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-9d288d22-8d78-40ba-8e97-7244c02e8e1a",
      "cw-0ccd7bc3-b0cd-45ec-8840-c488399c0140"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-2bec88dc-9acb-40fa-9d3b-95fac4ea9d1d",
    "manifestId": "https://dam.iuav.it/iuav/containers/ZnkO8Lv/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-0ccd7bc3-b0cd-45ec-8840-c488399c0140"
  }
}