Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iccu.sbn.it/edit16_393/containers/mepkO1d/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-6d0ae39e-97de-4266-b9b2-030637eb0593",
      "cw-f84e70f7-482d-42f8-9c7c-b146e6e98447"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": true,
    "id": "main-window",
    "manifestId": "https://dam.iccu.sbn.it/edit16_393/containers/mepkO1d/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-f84e70f7-482d-42f8-9c7c-b146e6e98447"
  }
}