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TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://api.digitale-sammlungen.de/iiif/presentation/v2/bsb00084811/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-e7bd0bb1-20bc-4e0e-9409-7eb0a2579a61",
      "cw-3e0bbdc2-7a0b-4afa-af00-583bc992fdef"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-56386a8e-8439-4d2d-8bf5-5bc8a6c23d46",
    "manifestId": "https://api.digitale-sammlungen.de/iiif/presentation/v2/bsb00084811/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": true,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-3e0bbdc2-7a0b-4afa-af00-583bc992fdef",
    "thumbnailNavigationPosition": "far-right",
    "allowClose": false,
    "canvasIndex": 0,
    "dfgViewerUrl": null,
    "loadedManifest": "https://api.digitale-sammlungen.de/iiif/presentation/v2/bsb00084811/manifest",
    "shiftBookView": false,
    "switchCanvasOnSearch": false,
    "view": "single"
  }
}