Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/9AVyBJv/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-ec59edf7-24bc-4942-a3af-6607243be81d",
      "cw-97cfe6cc-8796-4cea-95bc-e99134c089cf"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-c66355ed-8222-4a5b-a71a-f35c0704e231",
    "manifestId": "https://dam.iuav.it/iuav/containers/9AVyBJv/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-97cfe6cc-8796-4cea-95bc-e99134c089cf"
  }
}