TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://www.fina.gov.pl/manifest/P7598-1-B.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-33815d42-a6ce-41b2-b130-b61587b0c1f9",
      "cw-0eebcbd4-395f-40a5-9fe0-3675fd5a6c44"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-da4ba5ac-9f73-423e-8a90-501c2a9b312d",
    "manifestId": "https://www.fina.gov.pl/manifest/P7598-1-B.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-0eebcbd4-395f-40a5-9fe0-3675fd5a6c44",
    "view": "single"
  }
}