Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/e16nr1Z/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-600c4cfb-fa2f-44d6-9e24-38a4f7824070",
      "cw-214c40e8-febf-4764-be18-b116d0d1197b"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-4f51296d-92c9-447a-902a-73a5e20dc999",
    "manifestId": "https://dam.iuav.it/iuav/containers/e16nr1Z/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-214c40e8-febf-4764-be18-b116d0d1197b"
  }
}