Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.sma.unibo.it/smaunibo/containers/LnL36Jd/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-5f2fd771-a917-4b76-b0b5-b3d9a3380c21",
      "cw-187b90ee-241c-4876-bcf5-de6acf4dcc3c"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-ea986570-05c9-4324-a3ee-31e2b245a20f",
    "manifestId": "https://dam.sma.unibo.it/smaunibo/containers/LnL36Jd/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-187b90ee-241c-4876-bcf5-de6acf4dcc3c"
  }
}