Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/Zq0G8ze/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-3c00d337-c041-4da5-9cdc-b5f4e44859f4",
      "cw-4bde5e13-ecc5-4811-aa92-95db4475a5cb"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-c4f1bb79-b065-41c2-860b-29f745d322ac",
    "manifestId": "https://dam.iuav.it/iuav/containers/Zq0G8ze/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-4bde5e13-ecc5-4811-aa92-95db4475a5cb"
  }
}