Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/rvGLW1A/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-46ce152f-82b9-4d94-91f3-b22a16f4f2ce",
      "cw-a1519d8d-d2c5-407c-80fb-0f69aa2b6b5b"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-ef4f38ac-2171-47b3-89f3-2190049a1982",
    "manifestId": "https://dam.iuav.it/iuav/containers/rvGLW1A/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-a1519d8d-d2c5-407c-80fb-0f69aa2b6b5b"
  }
}