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TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://api.digitale-sammlungen.de/iiif/presentation/v2/bsb11166345/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-8ac63246-2e00-4fd4-b7d8-8dcfb63edc3b",
      "cw-d91fa229-8ee2-4001-b779-88c70c96d43c"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-c084b5f6-9d04-4b6a-a7cc-1c4162099521",
    "manifestId": "https://api.digitale-sammlungen.de/iiif/presentation/v2/bsb11166345/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": true,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-d91fa229-8ee2-4001-b779-88c70c96d43c",
    "thumbnailNavigationPosition": "far-right",
    "allowClose": false,
    "canvasIndex": 0,
    "dfgViewerUrl": null,
    "loadedManifest": "https://api.digitale-sammlungen.de/iiif/presentation/v2/bsb11166345/manifest",
    "shiftBookView": false,
    "switchCanvasOnSearch": false,
    "view": "single"
  }
}