Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/pvlGj3Z/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-191c26cc-f0c7-4c93-a806-2a9f040b5fbb",
      "cw-5fb6b1a9-e1e8-4bb0-aa17-8867ceaded42"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-bf8167f6-ba78-4148-b857-2c071bac7f6a",
    "manifestId": "https://dam.iuav.it/iuav/containers/pvlGj3Z/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-5fb6b1a9-e1e8-4bb0-aa17-8867ceaded42"
  }
}