Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.sma.unibo.it/smaunibo/containers/YQW83ED/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-3e054379-0cbf-4b75-a993-1a05ca7c20d4",
      "cw-3417aa28-2dab-4084-acb2-75e14f5d8a8b"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-c438acd9-a570-4356-b179-e78469ace601",
    "manifestId": "https://dam.sma.unibo.it/smaunibo/containers/YQW83ED/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-3417aa28-2dab-4084-acb2-75e14f5d8a8b"
  }
}