Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.sma.unibo.it/smaunibo/containers/LnLE5QM/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-c56d49ec-c1b0-4615-a120-03047b87e80d",
      "cw-51ee6475-c22c-44b3-92b2-2f11acdc5b16"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-2fa732cd-29fc-4119-9466-801c425b7293",
    "manifestId": "https://dam.sma.unibo.it/smaunibo/containers/LnLE5QM/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-51ee6475-c22c-44b3-92b2-2f11acdc5b16"
  }
}