Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/5AEp4Vv/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-0d821979-6271-4b1a-90a7-dbe289884649",
      "cw-1b883063-b7aa-4843-ac0c-cf16b1fe1ebc"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-18109d5c-25f3-4c89-a910-6f01af68436a",
    "manifestId": "https://dam.iuav.it/iuav/containers/5AEp4Vv/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-1b883063-b7aa-4843-ac0c-cf16b1fe1ebc"
  }
}