Mirador Viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://api.digitale-sammlungen.de/iiif/presentation/v2/bsb00085370_00029_u001/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-f2bdb4a0-f1e8-4fa8-a562-1f96be97f736",
      "cw-208d8a46-e840-4029-981c-3bd9d5dc8951"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-5e555a36-9c77-4a33-931b-df3a215e38f7",
    "manifestId": "https://api.digitale-sammlungen.de/iiif/presentation/v2/bsb00085370_00029_u001/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": true,
    "sideBarPanel": "calendar",
    "thumbnailNavigationId": "cw-208d8a46-e840-4029-981c-3bd9d5dc8951",
    "thumbnailNavigationPosition": "far-right",
    "allowClose": false,
    "calendarNavigation": {
      "issueId": "bsb00085370_00029_u001",
      "navDate": "1877-07-03",
      "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%3Absb00085370_00029_u001",
    "loadedManifest": "https://api.digitale-sammlungen.de/iiif/presentation/v2/bsb00085370_00029_u001/manifest",
    "shiftBookView": false,
    "switchCanvasOnSearch": true,
    "view": "book"
  }
}