Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/Jv6Lbje/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-3a0f42a8-54df-41f3-b5fe-8ff05b14edce",
      "cw-da8a3eea-dff7-40af-a76a-8293ff4e6ea1"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-391b5160-0ec4-4422-af46-aa4e21c32b1b",
    "manifestId": "https://dam.iuav.it/iuav/containers/Jv6Lbje/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-da8a3eea-dff7-40af-a76a-8293ff4e6ea1"
  }
}