Mirador Viewer

TypeError: Failed to fetch

{
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    "error": "TypeError: Failed to fetch",
    "id": "https://api.digitale-sammlungen.de/iiif/presentation/v2/bsb10504339_00965_u001/manifest",
    "isFetching": false
  },
  "window": {
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    "manifestId": "https://api.digitale-sammlungen.de/iiif/presentation/v2/bsb10504339_00965_u001/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": true,
    "sideBarPanel": "calendar",
    "thumbnailNavigationId": "cw-fc988bb5-bb40-459c-8ffc-e48009314f0d",
    "thumbnailNavigationPosition": "far-right",
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    "calendarNavigation": {
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      "navDate": "1840-03-01",
      "multId": "bsbmult00000002",
      "lastSearchUrl": null
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    "canvasIndex": -1,
    "dfgViewerUrl": null,
    "loadedManifest": "https://api.digitale-sammlungen.de/iiif/presentation/v2/bsb10504339_00965_u001/manifest",
    "shiftBookView": false,
    "switchCanvasOnSearch": true,
    "view": "book"
  }
}