Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/Zq0G9Qe/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-5ff99532-0071-4abd-8088-7f75b6e9ba84",
      "cw-950c2815-7a02-475d-9b9d-75d90a4535d1"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-eaea0e1b-f154-4180-a841-8a398c78b1f9",
    "manifestId": "https://dam.iuav.it/iuav/containers/Zq0G9Qe/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-950c2815-7a02-475d-9b9d-75d90a4535d1"
  }
}