Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/AEPg7Rv/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-f6365649-49da-405b-af67-4f0427d20402",
      "cw-f024b581-ebf2-4d49-99b4-f9de56b34e89"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-1168a68b-7f11-4220-a505-7ce056f79b0e",
    "manifestId": "https://dam.iuav.it/iuav/containers/AEPg7Rv/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-f024b581-ebf2-4d49-99b4-f9de56b34e89"
  }
}