Mirador Viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://api.digitale-sammlungen.de/iiif/presentation/v2/bsb10504149_01239_u001/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-fb48e959-653c-4277-8373-0185ffaf9b42",
      "cw-b11b65bd-7681-4b99-a1b7-904dcb2673dd"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-ed97b5ed-3710-4422-8366-b6d3272b2b2d",
    "manifestId": "https://api.digitale-sammlungen.de/iiif/presentation/v2/bsb10504149_01239_u001/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": true,
    "sideBarPanel": "calendar",
    "thumbnailNavigationId": "cw-b11b65bd-7681-4b99-a1b7-904dcb2673dd",
    "thumbnailNavigationPosition": "far-right",
    "allowClose": false,
    "calendarNavigation": {
      "issueId": "bsb10504149_01239_u001",
      "navDate": "1850-11-03",
      "multId": "bsbmult00000506",
      "lastSearchUrl": null
    },
    "canvasIndex": -1,
    "dfgViewerUrl": null,
    "loadedManifest": "https://api.digitale-sammlungen.de/iiif/presentation/v2/bsb10504149_01239_u001/manifest",
    "shiftBookView": false,
    "switchCanvasOnSearch": true,
    "view": "book"
  }
}