Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/ZnkqaMv/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-f1805e69-7fa0-4edb-bfdd-9ca7b422091d",
      "cw-938bd96e-46fa-4e45-962a-d67256516517"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-916aae5e-bb41-4f36-a7fa-89a1a0b76e8f",
    "manifestId": "https://dam.iuav.it/iuav/containers/ZnkqaMv/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-938bd96e-46fa-4e45-962a-d67256516517"
  }
}