Mirador viewer

TypeError: Failed to fetch
{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.sma.unibo.it/smaunibo/containers/9dbwNEn/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-c29cc38d-446f-47b3-9002-539c748a9cc2",
      "cw-c1d60ae8-2ef0-415d-befd-1364083010e2"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-845ad4b8-62e2-45fa-8130-69de7e0d985d",
    "manifestId": "https://dam.sma.unibo.it/smaunibo/containers/9dbwNEn/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-c1d60ae8-2ef0-415d-befd-1364083010e2"
  }
}