Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.sma.unibo.it/smaunibo/containers/2D1ey1D/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-1f75deb5-1702-44d2-87ca-54125be07f95",
      "cw-fd81e629-bb3f-4c67-8d23-9eb9c55f7b3c"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-3dede0f0-a7a8-47a5-a848-6f8a9ca89a15",
    "manifestId": "https://dam.sma.unibo.it/smaunibo/containers/2D1ey1D/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-fd81e629-bb3f-4c67-8d23-9eb9c55f7b3c"
  }
}