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TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://api.digitale-sammlungen.de/iiif/presentation/v2/bsb11175039/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-af923adf-62d0-4d3d-9085-86723a1b930d",
      "cw-46d08209-88ca-4a14-adf1-00efa2633666"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-77e8bdd6-5bca-448b-b642-8bbc6b8748ea",
    "manifestId": "https://api.digitale-sammlungen.de/iiif/presentation/v2/bsb11175039/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": true,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-46d08209-88ca-4a14-adf1-00efa2633666",
    "thumbnailNavigationPosition": "far-right",
    "allowClose": false,
    "canvasIndex": -1,
    "dfgViewerUrl": null,
    "loadedManifest": "https://api.digitale-sammlungen.de/iiif/presentation/v2/bsb11175039/manifest",
    "shiftBookView": false,
    "switchCanvasOnSearch": true,
    "view": "book"
  }
}