Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/5Ger1Gx/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://antenati.cultura.gov.it/ark:/12657/an_ua17965596/LPezmE7",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-9e320eef-1b66-4daa-a20e-4a199c6cef2e",
      "cw-da68f3ec-e7bc-4e31-81a9-d1f5891918fb"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-49673595-1bf2-4b1b-aa1b-152e19f04f51",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/5Ger1Gx/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-da68f3ec-e7bc-4e31-81a9-d1f5891918fb",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}