Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.sma.unibo.it/smaunibo/containers/bDkvpjQ/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-1ac27f2e-825d-4f12-a4fc-ffd7b735e3c4",
      "cw-ae280113-8000-4bae-aab0-4cb3d95134d2"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-cb6ce97a-be9d-4629-ab37-a7b7792c262e",
    "manifestId": "https://dam.sma.unibo.it/smaunibo/containers/bDkvpjQ/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-ae280113-8000-4bae-aab0-4cb3d95134d2"
  }
}