Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.sma.unibo.it/smaunibo/containers/YdXoXGD/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-630e630a-2b19-44a4-8261-86b6d89c9369",
      "cw-eefd9aac-2cd0-493d-b66f-6220deaaf9d5"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-07b07582-a681-4558-8719-8b072cb69f8c",
    "manifestId": "https://dam.sma.unibo.it/smaunibo/containers/YdXoXGD/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-eefd9aac-2cd0-493d-b66f-6220deaaf9d5"
  }
}