Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.sma.unibo.it/smaunibo/containers/JQoeojd/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-a5965018-f822-43d9-aefc-7a82f883c5d4",
      "cw-baae722f-6ea2-4fbe-b5fd-90f8d3c4506d"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-a520e609-5b4b-4b1a-96df-78ce4196a33e",
    "manifestId": "https://dam.sma.unibo.it/smaunibo/containers/JQoeojd/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-baae722f-6ea2-4fbe-b5fd-90f8d3c4506d"
  }
}