Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/e50RorA/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-3788dc25-0cb6-4c18-b7b8-820446820d86",
      "cw-3b41c535-ff01-45d8-aa8a-66275d0a066e"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-a98c2d97-2d4c-42b8-9c34-2ed62b43dd2a",
    "manifestId": "https://dam.iuav.it/iuav/containers/e50RorA/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-3b41c535-ff01-45d8-aa8a-66275d0a066e"
  }
}