Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.sma.unibo.it/smaunibo/containers/1DpMzwd/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-67f53cfc-7310-4c53-a4b9-27acce63181c",
      "cw-b1b24f2b-34f1-4ca6-967c-9bcfab1c2953"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-e0fd8ae2-c1be-4bbb-92ad-90d69facff1a",
    "manifestId": "https://dam.sma.unibo.it/smaunibo/containers/1DpMzwd/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-b1b24f2b-34f1-4ca6-967c-9bcfab1c2953"
  }
}