Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/XeWmgDv/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-6149f23f-64f6-44e7-aafd-57f061c476d9",
      "cw-35b97974-529e-4c02-88e1-fa6eef8c853b"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-b91489f2-e86b-4c6a-9eb7-7ad10ce0a470",
    "manifestId": "https://dam.iuav.it/iuav/containers/XeWmgDv/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-35b97974-529e-4c02-88e1-fa6eef8c853b"
  }
}