Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.sma.unibo.it/smaunibo/containers/vQBJozQ/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-5bab4d12-1dac-428c-8832-b01014942f50",
      "cw-df6da119-7403-4aef-97bd-c4f9f540c1db"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-21a17f81-e4ee-46bb-aa37-e2ed2b9923d0",
    "manifestId": "https://dam.sma.unibo.it/smaunibo/containers/vQBJozQ/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-df6da119-7403-4aef-97bd-c4f9f540c1db"
  }
}