TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://www.fina.gov.pl/manifest/pan_samochodzik_i_ni_5_manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-5e7c51ed-a0b9-489e-9ca6-10c7d92c90ff",
      "cw-0904f046-5621-492b-b6f1-512de124d593"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-b02836fb-d081-4d86-b96f-24076297e3bd",
    "manifestId": "https://www.fina.gov.pl/manifest/pan_samochodzik_i_ni_5_manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-0904f046-5621-492b-b6f1-512de124d593",
    "view": "single"
  }
}