TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://www.fina.gov.pl/manifest/Cspa2IvN_manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-1eb4149f-9ad9-4a4b-a083-8f105be13fb4",
      "cw-41b7866c-ff7d-4636-a280-a7467734e6fb"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-f2d6f095-9de7-4ae5-a180-ec36d0706fee",
    "manifestId": "https://www.fina.gov.pl/manifest/Cspa2IvN_manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-41b7866c-ff7d-4636-a280-a7467734e6fb",
    "view": "single"
  }
}