Mirador Viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://api.digitale-sammlungen.de/iiif/presentation/v2/bsb10504027_00815_u001/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-8fac8570-541c-46ee-8e98-475c973280fc",
      "cw-a00dfb5a-eec8-419e-97e8-6811530f8b1e"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-6a8b6366-fe21-4b5a-866c-1931c44f25ca",
    "manifestId": "https://api.digitale-sammlungen.de/iiif/presentation/v2/bsb10504027_00815_u001/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": true,
    "sideBarPanel": "calendar",
    "thumbnailNavigationId": "cw-a00dfb5a-eec8-419e-97e8-6811530f8b1e",
    "thumbnailNavigationPosition": "far-right",
    "allowClose": false,
    "calendarNavigation": {
      "issueId": "bsb10504027_00815_u001",
      "navDate": "1859-07-31",
      "multId": "bsbmult00000017",
      "lastSearchUrl": null
    },
    "canvasIndex": -1,
    "dfgViewerUrl": null,
    "loadedManifest": "https://api.digitale-sammlungen.de/iiif/presentation/v2/bsb10504027_00815_u001/manifest",
    "shiftBookView": false,
    "switchCanvasOnSearch": true,
    "view": "book"
  }
}