Mirador Viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://api.digitale-sammlungen.de/iiif/presentation/v2/bsb10501978_00521_u001/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-899a3f68-1781-4e30-9f30-64e9bc0aad89",
      "cw-983fb5fd-ac12-4a33-9d0d-e0bb7f3dd46d"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-23e76d8f-fd1e-4f5f-91e3-0eec80566bd1",
    "manifestId": "https://api.digitale-sammlungen.de/iiif/presentation/v2/bsb10501978_00521_u001/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": true,
    "sideBarPanel": "calendar",
    "thumbnailNavigationId": "cw-983fb5fd-ac12-4a33-9d0d-e0bb7f3dd46d",
    "thumbnailNavigationPosition": "far-right",
    "allowClose": false,
    "calendarNavigation": {
      "issueId": "bsb10501978_00521_u001",
      "navDate": "1788-01-01",
      "multId": "bsbmult00000267",
      "lastSearchUrl": null
    },
    "canvasIndex": -1,
    "dfgViewerUrl": null,
    "loadedManifest": "https://api.digitale-sammlungen.de/iiif/presentation/v2/bsb10501978_00521_u001/manifest",
    "shiftBookView": false,
    "switchCanvasOnSearch": true,
    "view": "book"
  }
}