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-f67af291-7560-487e-854c-3209471d736c",
      "cw-81e21fbd-7a8b-4c53-bb6d-e55d49799f5c"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-d5fef05f-ac94-48bf-ba2e-78c8da8e3b04",
    "manifestId": "https://dam.iuav.it/iuav/containers/RABW5de/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-81e21fbd-7a8b-4c53-bb6d-e55d49799f5c"
  }
}