TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://www.fina.gov.pl/manifest/zanim_nadejdzie_dzie_2_manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-70a4ce4c-2f1e-4cda-835b-6d7a3e198bba",
      "cw-f3097253-b908-4d9e-8ce9-2c312c7a05d4"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-6d7a354c-83e0-4ca2-8c58-f4b79ef520c0",
    "manifestId": "https://www.fina.gov.pl/manifest/zanim_nadejdzie_dzie_2_manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-f3097253-b908-4d9e-8ce9-2c312c7a05d4",
    "view": "single"
  }
}