Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/9ZNm1Be/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-59f72041-2bae-46d6-8da6-b1db140b2cc0",
      "cw-6082a678-3489-4ce5-b6aa-98fd9c78dbf0"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-ff2cacc9-f9c3-41c6-b263-bd0ab8c0347d",
    "manifestId": "https://dam.iuav.it/iuav/containers/9ZNm1Be/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-6082a678-3489-4ce5-b6aa-98fd9c78dbf0"
  }
}