Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/Znkx8Mv/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-3aa09b0c-3b5d-4100-97ae-de2f9245582b",
      "cw-3cd9e14a-5d68-45d5-ac34-ddce65a373fa"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-721b85c7-4f16-46c0-9c1a-5090c00d189d",
    "manifestId": "https://dam.iuav.it/iuav/containers/Znkx8Mv/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-3cd9e14a-5d68-45d5-ac34-ddce65a373fa"
  }
}