Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/Am6Pl9e/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-408cf2b1-d333-4c29-934c-33d7cd49b775",
      "cw-103ebd63-ac22-41e7-8edb-279b8446fadd"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-5fb5e73e-0e0a-4695-9c7f-344474c1253b",
    "manifestId": "https://dam.iuav.it/iuav/containers/Am6Pl9e/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-103ebd63-ac22-41e7-8edb-279b8446fadd"
  }
}