Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/wE9rxaq/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://antenati.cultura.gov.it/ark:/12657/an_ua35040602/5VVM7ZE",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-2d4eeb8c-ca72-486d-8df7-c654e3f3ec00",
      "cw-a11f6e61-9241-4180-be9e-0c42777902b2"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-553eca1b-0890-46ee-a014-b02b077b4307",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/wE9rxaq/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-a11f6e61-9241-4180-be9e-0c42777902b2",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}