Mirador Viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://api.digitale-sammlungen.de/iiif/presentation/v2/bsb10504147_00021_u001/manifest",
    "isFetching": false
  },
  "window": {
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    "companionAreaOpen": true,
    "companionWindowIds": [
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    "draggingEnabled": true,
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    "id": "window-09affd2d-262f-45dd-8443-71196fe3cfc4",
    "manifestId": "https://api.digitale-sammlungen.de/iiif/presentation/v2/bsb10504147_00021_u001/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": true,
    "sideBarPanel": "calendar",
    "thumbnailNavigationId": "cw-f6e2767d-ce5e-4c5c-90b5-e4a0016a1415",
    "thumbnailNavigationPosition": "far-right",
    "allowClose": false,
    "calendarNavigation": {
      "issueId": "bsb10504147_00021_u001",
      "navDate": "1848-01-04",
      "multId": "bsbmult00000506",
      "lastSearchUrl": null
    },
    "canvasIndex": -1,
    "dfgViewerUrl": null,
    "loadedManifest": "https://api.digitale-sammlungen.de/iiif/presentation/v2/bsb10504147_00021_u001/manifest",
    "shiftBookView": false,
    "switchCanvasOnSearch": true,
    "view": "book"
  }
}