Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.sma.unibo.it/smaunibo/containers/EdZMAwD/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-31c43f63-56a8-4025-9d0c-87ea52a3cbc5",
      "cw-641b168e-d890-4a81-a6db-1faff0094312"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-2d17fe18-4c1b-4dda-b725-766b007e39e7",
    "manifestId": "https://dam.sma.unibo.it/smaunibo/containers/EdZMAwD/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-641b168e-d890-4a81-a6db-1faff0094312"
  }
}