TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://www.fina.gov.pl/manifest/P8834-1-B.json",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
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      "cw-0959c120-507a-4816-a87f-370ee9798a3a"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-eab6dfa1-3a8d-4c73-a220-2c52c2e68561",
    "manifestId": "https://www.fina.gov.pl/manifest/P8834-1-B.json",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-0959c120-507a-4816-a87f-370ee9798a3a",
    "view": "single"
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}