Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.sma.unibo.it/smaunibo/containers/bDkOL2D/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-6e570902-df3c-496a-a326-f594e279a823",
      "cw-14b10fc1-2328-4693-a2ab-52852916fb35"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-6eb3fc28-f13a-45d6-a160-d390fbfe474e",
    "manifestId": "https://dam.sma.unibo.it/smaunibo/containers/bDkOL2D/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-14b10fc1-2328-4693-a2ab-52852916fb35"
  }
}