Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/Jvaz2DA/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-247bad0e-ab22-4547-a470-f25e739b2871",
      "cw-b63e4f4c-f12f-42bc-9128-75cb88b79850"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-7b645f66-898b-4d4a-a244-6c41222a6c46",
    "manifestId": "https://dam.iuav.it/iuav/containers/Jvaz2DA/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-b63e4f4c-f12f-42bc-9128-75cb88b79850"
  }
}