Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.sma.unibo.it/smaunibo/containers/MdaWxXQ/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-ed97cf8c-fc37-4bc8-8508-caad149591e9",
      "cw-d201013a-641d-42e3-abd0-095df4f6fb66"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-c8d748ac-1ae9-4855-8b70-b69cf97fb67f",
    "manifestId": "https://dam.sma.unibo.it/smaunibo/containers/MdaWxXQ/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-d201013a-641d-42e3-abd0-095df4f6fb66"
  }
}