Mirador Viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://api.digitale-sammlungen.de/iiif/presentation/v2/bsb10504227_00229_u001/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-4f4da370-6911-449f-84bd-84a67d41ee0b",
      "cw-94d57c33-445f-4c56-b9ce-5eee30b6d746"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-3c5e4a67-f9b0-4096-982a-ae2da9b61a89",
    "manifestId": "https://api.digitale-sammlungen.de/iiif/presentation/v2/bsb10504227_00229_u001/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": true,
    "sideBarPanel": "calendar",
    "thumbnailNavigationId": "cw-94d57c33-445f-4c56-b9ce-5eee30b6d746",
    "thumbnailNavigationPosition": "far-right",
    "allowClose": false,
    "calendarNavigation": {
      "issueId": "bsb10504227_00229_u001",
      "navDate": "1818-04-15",
      "multId": "bsbmult00000023",
      "lastSearchUrl": null
    },
    "canvasIndex": -1,
    "dfgViewerUrl": null,
    "loadedManifest": "https://api.digitale-sammlungen.de/iiif/presentation/v2/bsb10504227_00229_u001/manifest",
    "shiftBookView": false,
    "switchCanvasOnSearch": true,
    "view": "book"
  }
}