Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.sma.unibo.it/smaunibo/containers/BDYw7Kn/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-d3da03c4-ae9a-4010-b698-0049c631c811",
      "cw-73077640-03f7-4ded-a87e-33d071bd8297"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-d6755c04-4fe1-482f-a783-5086b7054016",
    "manifestId": "https://dam.sma.unibo.it/smaunibo/containers/BDYw7Kn/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-73077640-03f7-4ded-a87e-33d071bd8297"
  }
}