Mirador Viewer

TypeError: Failed to fetch

{
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    "error": "TypeError: Failed to fetch",
    "id": "https://api.digitale-sammlungen.de/iiif/presentation/v2/bsb00090992/manifest",
    "isFetching": false
  },
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    "maximized": false,
    "rangeId": null,
    "rotation": null,
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    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-a56ea057-c8ca-4cc1-b1b0-8122e9bc2a53",
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    "dfgViewerUrl": "https://dfg-viewer.de/show?tx_dlf%5Bid%5D=https%3A%2F%2Fapi.digitale-sammlungen.de%2Fdfg%2Fmets%2Fmods%2Fv1%2Fdigitalobjects%2Fidentifier%2Fmdz-obj%3Absb00090992",
    "loadedManifest": "https://api.digitale-sammlungen.de/iiif/presentation/v2/bsb00090992/manifest",
    "shiftBookView": false,
    "switchCanvasOnSearch": true,
    "view": "book"
  }
}