Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.sma.unibo.it/smaunibo/containers/mdqllwD/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-0823b3f6-cf26-4406-8770-f82e0616d127",
      "cw-286972e8-f018-4a03-9761-4772a5c46abb"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-efa31cc4-7283-49d8-bb0a-bb07b393e056",
    "manifestId": "https://dam.sma.unibo.it/smaunibo/containers/mdqllwD/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-286972e8-f018-4a03-9761-4772a5c46abb"
  }
}