TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://www.fina.gov.pl/manifest/pan_wolodyjowski__ko_manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
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      "cw-504ab8d5-5e7b-47b7-a869-0171fe13a06a"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-4939b9e4-96ff-40f9-907e-3318ffde9df0",
    "manifestId": "https://www.fina.gov.pl/manifest/pan_wolodyjowski__ko_manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-504ab8d5-5e7b-47b7-a869-0171fe13a06a",
    "view": "single"
  }
}