Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam-antenati.cultura.gov.it/antenati/containers/Lmy9mlb/manifest",
    "isFetching": false
  },
  "viewer": null,
  "window": {
    "canvasId": "https://antenati.cultura.gov.it/ark:/12657/an_ua548709/5VRm2PP",
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-c7c268c5-2e0b-41c0-8f02-82d7b93e2d54",
      "cw-c1fe5274-ef1e-4c95-b80b-b5e2e0e8fe19"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-454d14ef-68d5-4a37-b55f-13397c00e436",
    "manifestId": "https://dam-antenati.cultura.gov.it/antenati/containers/Lmy9mlb/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-c1fe5274-ef1e-4c95-b80b-b5e2e0e8fe19",
    "imageToolsEnabled": true,
    "imageToolsOpen": true,
    "visibleCanvases": []
  }
}