Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/ArPmPpZ/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-ee815a65-97e2-4f41-aeb5-dc24136b544f",
      "cw-0a61d374-db42-48f7-8642-49da072d5ca0"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-c799470e-20ff-4478-a93e-92c6366fbcc9",
    "manifestId": "https://dam.iuav.it/iuav/containers/ArPmPpZ/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-0a61d374-db42-48f7-8642-49da072d5ca0"
  }
}