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TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/Lppm2n1/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://antenati.cultura.gov.it/ark:/12657/an_ua2746243/LeJDVNy",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
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      "cw-6ef2f4b3-0cbb-42b7-8adb-d40b4add8ff0"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-4aef791c-d764-4fbc-81a5-8f7568b8f6b9",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/Lppm2n1/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-6ef2f4b3-0cbb-42b7-8adb-d40b4add8ff0",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}