TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://www.fina.gov.pl/manifest/IKquJGPw_manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-f541e61e-146f-4a11-92dc-e1029708514c",
      "cw-6e2d7a3f-660c-436b-936b-e2cde5b19a93"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-e7bd293d-a8ee-45c0-8ec2-539e0ebc0a6f",
    "manifestId": "https://www.fina.gov.pl/manifest/IKquJGPw_manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-6e2d7a3f-660c-436b-936b-e2cde5b19a93",
    "view": "single"
  }
}