Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/vLEpj0A/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-6874e0c2-52b3-4c82-89ff-312e19637655",
      "cw-ac91faa5-2e5f-4b7b-a8eb-f5b9f14d37d3"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-2ac1b4ef-6e92-4cab-9f08-1af1f7eaf991",
    "manifestId": "https://dam.iuav.it/iuav/containers/vLEpj0A/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-ac91faa5-2e5f-4b7b-a8eb-f5b9f14d37d3"
  }
}