Mirador Viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://api.digitale-sammlungen.de/iiif/presentation/v2/bsb10503721_00735_u001/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-002a860d-a3d0-405d-9f97-9582538dd6dd",
      "cw-68984863-3f84-4a33-9bb1-1d201681f08c"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-766a9a49-f8ac-462c-96c0-2c3d14c50ff9",
    "manifestId": "https://api.digitale-sammlungen.de/iiif/presentation/v2/bsb10503721_00735_u001/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": true,
    "sideBarPanel": "calendar",
    "thumbnailNavigationId": "cw-68984863-3f84-4a33-9bb1-1d201681f08c",
    "thumbnailNavigationPosition": "far-right",
    "allowClose": false,
    "calendarNavigation": {
      "issueId": "bsb10503721_00735_u001",
      "navDate": "1864-04-13",
      "multId": "bsbmult00000678",
      "lastSearchUrl": null
    },
    "canvasIndex": -1,
    "dfgViewerUrl": null,
    "loadedManifest": "https://api.digitale-sammlungen.de/iiif/presentation/v2/bsb10503721_00735_u001/manifest",
    "shiftBookView": false,
    "switchCanvasOnSearch": true,
    "view": "book"
  }
}