Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/nZbdV8A/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-3ba7dfe8-d0ad-4701-aa8b-99e84ed3cde2",
      "cw-fc6cc1b7-e88d-4d96-aaee-a952a09a45c6"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-b9649f66-0dc5-464f-b6a7-576b645e607d",
    "manifestId": "https://dam.iuav.it/iuav/containers/nZbdV8A/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-fc6cc1b7-e88d-4d96-aaee-a952a09a45c6"
  }
}