Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/9AVyW7v/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-89ac1768-9e71-4042-9713-8c9dd855d365",
      "cw-85323795-df6a-4d8d-ba4a-b8097c109bee"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-05709f19-3aa0-4cd6-9260-75a1fdf6fd53",
    "manifestId": "https://dam.iuav.it/iuav/containers/9AVyW7v/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-85323795-df6a-4d8d-ba4a-b8097c109bee"
  }
}