TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://www.fina.gov.pl/manifest/XZcpi7qR_manifest.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-4be04162-09cb-415f-953e-076e1ffca473",
      "cw-6c0f0f3a-c168-46a1-a8e4-8b4fc637d2f6"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-021e72f7-768d-4c5e-8e69-f0e2623e1803",
    "manifestId": "https://www.fina.gov.pl/manifest/XZcpi7qR_manifest.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-6c0f0f3a-c168-46a1-a8e4-8b4fc637d2f6",
    "view": "single"
  }
}