Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.sma.unibo.it/smaunibo/containers/vQBXyzd/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-7e881f86-a5c7-46b2-b8d9-770f7651df66",
      "cw-6eb37739-49eb-45d9-a2b7-170e8cdc506d"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-0441a8c9-2484-4cef-becc-23105d06f83b",
    "manifestId": "https://dam.sma.unibo.it/smaunibo/containers/vQBXyzd/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-6eb37739-49eb-45d9-a2b7-170e8cdc506d"
  }
}