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TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://api.digitale-sammlungen.de/iiif/presentation/v2/bsb00096063/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-0c7dac76-79d6-4f5c-9c98-b351199269dc",
      "cw-ee0657bd-592d-4f13-afe2-027201b6760d"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-387c1164-936e-4f5a-9758-66215de08d83",
    "manifestId": "https://api.digitale-sammlungen.de/iiif/presentation/v2/bsb00096063/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": true,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-ee0657bd-592d-4f13-afe2-027201b6760d",
    "thumbnailNavigationPosition": "far-right",
    "allowClose": false,
    "canvasIndex": -1,
    "dfgViewerUrl": null,
    "loadedManifest": "https://api.digitale-sammlungen.de/iiif/presentation/v2/bsb00096063/manifest",
    "shiftBookView": false,
    "switchCanvasOnSearch": true,
    "view": "book"
  }
}