Mirador viewer

TypeError: Failed to fetch

{
  "manifest": {
    "error": "TypeError: Failed to fetch",
    "id": "https://dam.iuav.it/iuav/containers/v49gaJA/manifest",
    "isFetching": false
  },
  "window": {
    "collectionIndex": 0,
    "companionAreaOpen": true,
    "companionWindowIds": [
      "cw-4776dcfa-e1e1-4dce-ae6a-4f83eb480a4b",
      "cw-aba0a783-b536-49f9-91a0-f2b9b5ad59e1"
    ],
    "draggingEnabled": true,
    "highlightAllAnnotations": false,
    "id": "window-dc3891fc-17d5-4bec-8b67-180f1c1cda84",
    "manifestId": "https://dam.iuav.it/iuav/containers/v49gaJA/manifest",
    "maximized": false,
    "rangeId": null,
    "rotation": null,
    "selectedAnnotations": {},
    "sideBarOpen": false,
    "sideBarPanel": "info",
    "thumbnailNavigationId": "cw-aba0a783-b536-49f9-91a0-f2b9b5ad59e1"
  }
}