Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.sma.unibo.it/smaunibo/containers/bDkw1bD/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-5158d242-0b87-4350-9476-1b25dbe046aa",
      "cw-3c2c6a95-47de-4ef5-8724-d6a65f9f9129"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-ad66e49d-d405-4164-89d1-63241794e569",
    "manifestId": "https://dam.sma.unibo.it/smaunibo/containers/bDkw1bD/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-3c2c6a95-47de-4ef5-8724-d6a65f9f9129"
  }
}