Mirador Viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://api.digitale-sammlungen.de/iiif/presentation/v2/bsb11305700_00521_u001/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-6ce045e3-c273-4b50-b15e-814ea3571fa1",
      "cw-1bc22ee2-ae18-43a7-a579-a6b5cfb2a7a2"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-577d5ced-bf50-4b6d-9253-2a4cdca23582",
    "manifestId": "https://api.digitale-sammlungen.de/iiif/presentation/v2/bsb11305700_00521_u001/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": true,
    "sideBarPanel": "calendar",
    "thumbnailNavigationId": "cw-1bc22ee2-ae18-43a7-a579-a6b5cfb2a7a2",
    "thumbnailNavigationPosition": "far-right",
    "allowClose": false,
    "calendarNavigation": {
      "issueId": "bsb11305700_00521_u001",
      "navDate": "1875-06-06",
      "multId": "bsbmult00000439",
      "lastSearchUrl": null
    },
    "canvasIndex": 0,
    "dfgViewerUrl": null,
    "loadedManifest": "https://api.digitale-sammlungen.de/iiif/presentation/v2/bsb11305700_00521_u001/manifest",
    "shiftBookView": false,
    "switchCanvasOnSearch": false,
    "view": "single"
  }
}