Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/nv7Vx0Z/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-32a65cb2-1e13-477a-b543-c79ed7b44d51",
      "cw-b6ab6537-a85c-4012-955f-997b86758bc4"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-847c01f7-a2dc-4150-8ae5-04596727d160",
    "manifestId": "https://dam.iuav.it/iuav/containers/nv7Vx0Z/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-b6ab6537-a85c-4012-955f-997b86758bc4"
  }
}