Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/LD8qWBq/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://antenati.cultura.gov.it/ark:/12657/an_ua547754/wE4PMM7",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-5d6fe0bb-1778-4754-af5f-ac57fadc333c",
      "cw-7f2e005e-fa49-402e-97c1-0a737bfb6ce9"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-0e17b4ca-26d6-401a-bef3-e12f71e2fb00",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/LD8qWBq/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-7f2e005e-fa49-402e-97c1-0a737bfb6ce9",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}