Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/ZnkMmyv/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-19ae6ef8-2358-48af-a2c2-61b350ffe608",
      "cw-052401bc-f0da-4e13-a16a-170a25beefb9"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-9d487a22-a8dc-4900-8031-96e78fb192c9",
    "manifestId": "https://dam.iuav.it/iuav/containers/ZnkMmyv/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-052401bc-f0da-4e13-a16a-170a25beefb9"
  }
}