Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/ZbQqx1e/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-35778511-e032-4a2c-8107-12a1d3e0fe1c",
      "cw-bc2e85d7-4aa7-4a71-9e3f-c69d03c97ff4"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-1439d6c1-e2c9-4c0d-951c-518273387cb8",
    "manifestId": "https://dam.iuav.it/iuav/containers/ZbQqx1e/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-bc2e85d7-4aa7-4a71-9e3f-c69d03c97ff4"
  }
}