Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/5v25EqZ/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-f07f4b6b-0a6a-4c57-8613-3c9b4ef6e062",
      "cw-88999c03-b735-47eb-9b8d-57148405ce4e"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-81bcf8cb-b7f0-4629-b7eb-bf453c735783",
    "manifestId": "https://dam.iuav.it/iuav/containers/5v25EqZ/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-88999c03-b735-47eb-9b8d-57148405ce4e"
  }
}