Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/nZbWK7v/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-04e96618-b9d9-476e-84b2-560937040fdb",
      "cw-f404c25c-31cf-4082-8818-25ade308b04d"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-c0fda421-bde4-46f5-bebf-87e576eb5e9d",
    "manifestId": "https://dam.iuav.it/iuav/containers/nZbWK7v/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-f404c25c-31cf-4082-8818-25ade308b04d"
  }
}