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TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://api.digitale-sammlungen.de/iiif/presentation/v2/bsb11173212/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-a31f0ffe-0d92-4c92-9c5c-1a7c3ca87055",
      "cw-344b9cc5-56d1-453a-bcab-748a18fd1a7b"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-a70e459e-50ab-4ec9-9b47-ce9cd4a8dfd6",
    "manifestId": "https://api.digitale-sammlungen.de/iiif/presentation/v2/bsb11173212/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": true,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-344b9cc5-56d1-453a-bcab-748a18fd1a7b",
    "thumbnailNavigationPosition": "far-right",
    "allowClose": false,
    "canvasIndex": -1,
    "dfgViewerUrl": null,
    "loadedManifest": "https://api.digitale-sammlungen.de/iiif/presentation/v2/bsb11173212/manifest",
    "shiftBookView": false,
    "switchCanvasOnSearch": true,
    "view": "book"
  }
}