TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://objects.library.uu.nl/manifest/iiif/v3/1874-348833",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-84fe1c63-cd98-47cb-9712-2f2764bbffa3",
      "cw-f8d6efbf-e7a5-4149-991c-251357b7de78"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-49af5b7c-bee8-4998-a7b3-1d1954a03ee7",
    "manifestId": "https://objects.library.uu.nl/manifest/iiif/v3/1874-348833",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": true,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-f8d6efbf-e7a5-4149-991c-251357b7de78",
    "thumbnailNavigationPosition": "far-right",
    "allowClose": false,
    "view": "single",
    "canvasIndex": "0"
  }
}