Mirador Viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://api.digitale-sammlungen.de/iiif/presentation/v2/bsb00001127_00921_u001/manifest",
    "isFetching": false
  },
  "window": {
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    "companionAreaOpen": true,
    "companionWindowIds": [
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    "id": "window-79fe61f8-be08-4a2d-8dc9-75b0072d42f7",
    "manifestId": "https://api.digitale-sammlungen.de/iiif/presentation/v2/bsb00001127_00921_u001/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": true,
    "sideBarPanel": "calendar",
    "thumbnailNavigationId": "cw-fdc73b45-4815-47bd-9b32-3265f837b9db",
    "thumbnailNavigationPosition": "far-right",
    "allowClose": false,
    "calendarNavigation": {
      "issueId": "bsb00001127_00921_u001",
      "navDate": "1889-07-17",
      "multId": "bsbmult00000820",
      "lastSearchUrl": null
    },
    "canvasIndex": -1,
    "dfgViewerUrl": null,
    "loadedManifest": "https://api.digitale-sammlungen.de/iiif/presentation/v2/bsb00001127_00921_u001/manifest",
    "shiftBookView": false,
    "switchCanvasOnSearch": true,
    "view": "book"
  }
}