Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/v685N1e/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-a7017504-9c8f-4493-ac0d-f3a90fbc018f",
      "cw-fb1b99be-06b7-4223-bdfb-9fb2c05b5695"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-ef3e25f2-d53b-4cd2-8d6c-a05a3b0684ec",
    "manifestId": "https://dam.iuav.it/iuav/containers/v685N1e/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-fb1b99be-06b7-4223-bdfb-9fb2c05b5695"
  }
}