Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/AwqMBGZ/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-c02a6416-9836-4d1a-9fdc-7b93ebaeafe9",
      "cw-04a0606a-3dbf-407a-a27c-a2f04f7d2f67"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-fb1e3c51-3ce2-448f-8ec9-c6f1b4ffc8d3",
    "manifestId": "https://dam.iuav.it/iuav/containers/AwqMBGZ/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-04a0606a-3dbf-407a-a27c-a2f04f7d2f67"
  }
}