TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://www.fina.gov.pl/manifest/J0mZxusY_manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-9404d626-c62e-4529-ac74-5f7dc07facf8",
      "cw-dba1f15e-9961-42ef-ac37-e6f12440c2a1"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-fb2d7b07-fbc5-4fdb-a3bc-29a83ce94628",
    "manifestId": "https://www.fina.gov.pl/manifest/J0mZxusY_manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-dba1f15e-9961-42ef-ac37-e6f12440c2a1",
    "view": "single"
  }
}