Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/Znkxl7v/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-0886e376-accb-4faf-9095-090f24948158",
      "cw-6dda87f3-c30c-4b6f-998c-efd7aef6a13a"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-bb2e4153-896a-4979-b4b7-316cf3595b3a",
    "manifestId": "https://dam.iuav.it/iuav/containers/Znkxl7v/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-6dda87f3-c30c-4b6f-998c-efd7aef6a13a"
  }
}