Mirador Viewer

TypeError: Failed to fetch

{
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    "error": "TypeError: Failed to fetch",
    "id": "https://api.digitale-sammlungen.de/iiif/presentation/v2/bsb10504777_00979_u001/manifest",
    "isFetching": false
  },
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    "manifestId": "https://api.digitale-sammlungen.de/iiif/presentation/v2/bsb10504777_00979_u001/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
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    "thumbnailNavigationId": "cw-86b6e2ff-6dcf-47cb-98a2-55b2bffbebbf",
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      "navDate": "1818-06-18",
      "multId": "bsbmult00000002",
      "lastSearchUrl": null
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    "canvasIndex": -1,
    "dfgViewerUrl": null,
    "loadedManifest": "https://api.digitale-sammlungen.de/iiif/presentation/v2/bsb10504777_00979_u001/manifest",
    "shiftBookView": false,
    "switchCanvasOnSearch": true,
    "view": "book"
  }
}