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TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://api.digitale-sammlungen.de/iiif/presentation/v2/bsb00090430/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-7d779700-5253-430c-98ee-f295f84faa8a",
      "cw-0785d2b5-7b8b-4ebc-a6da-522413b87631"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-765c698f-3586-425d-849b-5e5c094068b8",
    "manifestId": "https://api.digitale-sammlungen.de/iiif/presentation/v2/bsb00090430/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": true,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-0785d2b5-7b8b-4ebc-a6da-522413b87631",
    "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%3Absb00090430",
    "loadedManifest": "https://api.digitale-sammlungen.de/iiif/presentation/v2/bsb00090430/manifest",
    "shiftBookView": false,
    "switchCanvasOnSearch": true,
    "view": "book"
  }
}