Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.sma.unibo.it/smaunibo/containers/YdXogJD/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-8e1005a1-ad20-4fbf-a882-ecf8be45edd4",
      "cw-8e1aca53-c62d-4500-ab02-642af8b7f99a"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-a53d5373-8093-4626-aaf5-6e6717fd37ca",
    "manifestId": "https://dam.sma.unibo.it/smaunibo/containers/YdXogJD/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-8e1aca53-c62d-4500-ab02-642af8b7f99a"
  }
}