Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/5xJ7klV/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://antenati.cultura.gov.it/ark:/12657/an_ua600336/5Yed6vB",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-b6897e1f-7e0a-4460-98c5-ef6097ebc804",
      "cw-5aae836f-044c-4f83-b695-8298edf5253a"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-1371dc1e-1fb8-4ce9-9a81-5ace6d7e6b8b",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/5xJ7klV/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-5aae836f-044c-4f83-b695-8298edf5253a",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}