Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/RABW5de/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-a020f28f-d4b7-4535-b895-510e9a82aeea",
      "cw-ae38a6c3-5bab-4060-a534-48dc3bce5b42"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-7e4a3629-4a4a-4755-a11b-cfbf486ebc26",
    "manifestId": "https://dam.iuav.it/iuav/containers/RABW5de/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-ae38a6c3-5bab-4060-a534-48dc3bce5b42"
  }
}