Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/Az5opBv/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-64b92d3c-107f-48a0-b0b4-2cb7c5c52ca4",
      "cw-c603d361-7d7a-442c-9292-bcea5e468648"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-5782010c-22d4-4d39-b7c6-d5abee43ef14",
    "manifestId": "https://dam.iuav.it/iuav/containers/Az5opBv/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-c603d361-7d7a-442c-9292-bcea5e468648"
  }
}