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TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://api.digitale-sammlungen.de/iiif/presentation/v2/bsb00096051/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-7f21035f-74f7-4d4e-8004-1224808a8856",
      "cw-bcdc0870-bd49-4da7-a130-bdddbb04d522"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-623f6675-7895-4812-829f-d2a6a3082526",
    "manifestId": "https://api.digitale-sammlungen.de/iiif/presentation/v2/bsb00096051/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": true,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-bcdc0870-bd49-4da7-a130-bdddbb04d522",
    "thumbnailNavigationPosition": "far-right",
    "allowClose": false,
    "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%3Absb00096051",
    "loadedManifest": "https://api.digitale-sammlungen.de/iiif/presentation/v2/bsb00096051/manifest",
    "shiftBookView": false,
    "switchCanvasOnSearch": true,
    "view": "book"
  }
}