Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/5KOJPOd/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://antenati.cultura.gov.it/ark:/12657/an_ua550957/LqlZr4D",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-5e12affe-fb27-47ec-9ac4-b5e790c35257",
      "cw-aea34f99-f472-48d2-8521-f218e00b4ae0"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-264f5adb-c82e-498f-869c-e3abf436fcd5",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/5KOJPOd/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-aea34f99-f472-48d2-8521-f218e00b4ae0",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}