TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://www.fina.gov.pl/manifest/ENfeWzNE_manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-e8c7c549-c812-4ed2-b509-2942249ee8a8",
      "cw-73effbc9-4809-4710-81ec-ff244c14098b"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-cf28012f-ce2b-4d18-8c82-b8754280b635",
    "manifestId": "https://www.fina.gov.pl/manifest/ENfeWzNE_manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-73effbc9-4809-4710-81ec-ff244c14098b",
    "view": "single"
  }
}