Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/ZbQ1m7e/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-0f701f7f-3c1d-43d5-8da4-596edbb031a1",
      "cw-7e15e61c-4726-4699-87a6-bd517ed3a22e"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-4d6f6076-27a1-4922-89a3-993b2b6ccfa3",
    "manifestId": "https://dam.iuav.it/iuav/containers/ZbQ1m7e/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-7e15e61c-4726-4699-87a6-bd517ed3a22e"
  }
}