Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/JZqEWjZ/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-69b8acba-677a-4e4c-9f26-b06a1adfe3b0",
      "cw-cbcd05a3-d47b-4550-9df0-19620dd3c092"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-fe475e91-f9f9-4909-854b-dd5023396b82",
    "manifestId": "https://dam.iuav.it/iuav/containers/JZqEWjZ/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-cbcd05a3-d47b-4550-9df0-19620dd3c092"
  }
}