Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/v68686e/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-94e01634-0cd5-4d25-a05b-a295095e1326",
      "cw-c7fd9541-e980-4627-8385-2bd2f3749bf8"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-11050bfe-3185-4d94-871f-817786d496b9",
    "manifestId": "https://dam.iuav.it/iuav/containers/v68686e/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-c7fd9541-e980-4627-8385-2bd2f3749bf8"
  }
}