Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/5VVxrQd/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://antenati.cultura.gov.it/ark:/12657/an_ua34990128/0342emJ",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-173380d5-80bf-4204-af4a-539859af0751",
      "cw-be2edc2f-1f33-4930-9a1c-f3b4715534df"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-3537e6ff-98dc-4318-baed-6edaceb48083",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/5VVxrQd/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-be2edc2f-1f33-4930-9a1c-f3b4715534df",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}