TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://www.fina.gov.pl/manifest/1PR7WCuj_manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-a6a9608f-2d37-45a4-827d-5de3e3605809",
      "cw-a549eb97-9808-480f-9d31-d22a1a193b7e"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-0c295ee0-2d84-4b41-8b91-412d04fc9063",
    "manifestId": "https://www.fina.gov.pl/manifest/1PR7WCuj_manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-a549eb97-9808-480f-9d31-d22a1a193b7e",
    "view": "single"
  }
}