Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/ZYz4rYv/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-f9f8a62d-3e42-4182-9b61-65587d245427",
      "cw-adc58352-f136-4b56-baeb-f03e3bee443a"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-d234c0cc-eb28-4e53-b611-5c91e8917410",
    "manifestId": "https://dam.iuav.it/iuav/containers/ZYz4rYv/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-adc58352-f136-4b56-baeb-f03e3bee443a"
  }
}