Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/RABmqEv/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-01b9a828-0a7a-4181-a495-49c16d57c535",
      "cw-3b31365b-32df-4d83-8df5-790d98aac5ac"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-0fbcfe40-053a-4d45-9162-3bbb5e9390a0",
    "manifestId": "https://dam.iuav.it/iuav/containers/RABmqEv/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-3b31365b-32df-4d83-8df5-790d98aac5ac"
  }
}