Mirador Viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://api.digitale-sammlungen.de/iiif/presentation/v2/bsb00085527_00085_u001/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-e0eb141f-10f7-4e8e-92c5-f37bd3574c08",
      "cw-8ea4bd3b-0b9c-4300-8c81-702f6a4cfc47"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-f9a853f0-ee00-4312-86c2-0a4a8f0319e1",
    "manifestId": "https://api.digitale-sammlungen.de/iiif/presentation/v2/bsb00085527_00085_u001/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": true,
    "sideBarPanel": "calendar",
    "thumbnailNavigationId": "cw-8ea4bd3b-0b9c-4300-8c81-702f6a4cfc47",
    "thumbnailNavigationPosition": "far-right",
    "allowClose": false,
    "calendarNavigation": {
      "issueId": "bsb00085527_00085_u001",
      "navDate": "1889-12-05",
      "multId": "bsbmult00000002",
      "lastSearchUrl": null
    },
    "canvasIndex": -1,
    "dfgViewerUrl": "https://dfg-viewer.de/show?tx_dlf%5Bid%5D=https%3A%2F%2Fapi.digitale-sammlungen.de%2Fdfg%2Fmets%2Fmods%2Fv1%2Fdigitalobjects%2Fidentifier%2Fmdz-obj-child%3Absb00085527_00085_u001",
    "loadedManifest": "https://api.digitale-sammlungen.de/iiif/presentation/v2/bsb00085527_00085_u001/manifest",
    "shiftBookView": false,
    "switchCanvasOnSearch": true,
    "view": "book"
  }
}