Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/v49gaJA/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-bd9bc129-5771-4524-8c6f-94963018b372",
      "cw-0c26278e-a4bd-4498-b96a-f1f331586d7f"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-cd6ac3f4-2a35-46f1-a7b0-bf0db3f03308",
    "manifestId": "https://dam.iuav.it/iuav/containers/v49gaJA/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-0c26278e-a4bd-4498-b96a-f1f331586d7f"
  }
}