TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://www.fina.gov.pl/manifest/VlaQJHuU_manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-21563cff-ad6c-4b40-a192-75ad765010fc",
      "cw-af559e94-33bc-436a-9261-a958008a28dd"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-bb39527b-996c-4982-8db1-84a7af96eccf",
    "manifestId": "https://www.fina.gov.pl/manifest/VlaQJHuU_manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-af559e94-33bc-436a-9261-a958008a28dd",
    "view": "single"
  }
}