Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/RABO2De/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-ca89187c-0986-4e97-854f-bca832c1c665",
      "cw-f4e44f05-be48-4d1d-8a1d-b6cfad232e25"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-fc4c7f90-a8e1-49d4-92ac-862f258129bb",
    "manifestId": "https://dam.iuav.it/iuav/containers/RABO2De/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-f4e44f05-be48-4d1d-8a1d-b6cfad232e25"
  }
}