Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/zegXwdZ/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-c9d41bd4-fa10-4cb9-9b45-f1e89bc74580",
      "cw-ebb241fa-0d7a-4964-8279-db87ea94f6d6"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-d6957a07-7de6-4f45-ab16-b72f25385948",
    "manifestId": "https://dam.iuav.it/iuav/containers/zegXwdZ/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-ebb241fa-0d7a-4964-8279-db87ea94f6d6"
  }
}