Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/e50BB1A/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-d376a20a-1177-4f46-9a31-94b9e1889131",
      "cw-45bc6303-6b32-42e3-ae2c-9fbc3b4f0a8b"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-e820bfe7-2904-4fe5-8e7d-2153f01adedd",
    "manifestId": "https://dam.iuav.it/iuav/containers/e50BB1A/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-45bc6303-6b32-42e3-ae2c-9fbc3b4f0a8b"
  }
}