Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/vRdnnje/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-da1e209c-3db6-4920-8d00-a2293ae9130b",
      "cw-4957a4e0-c4a9-4449-9cf0-f505681f4061"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-ec11f8e0-1cd3-4646-8dd4-97fdd95dcd4e",
    "manifestId": "https://dam.iuav.it/iuav/containers/vRdnnje/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-4957a4e0-c4a9-4449-9cf0-f505681f4061"
  }
}