with SG 1.3, so it’s not an illegal settings. I think the problem is in the proxycache entries which are indeed deprecated. But the error message is missleading.
The issue was created for the development team. You can find it at the link below:
You can use basicauth authentication in kibana.yml instead for the migration process and then switch manually to proxy once migrated. The proxy authentication type is supported as per the SG FLX documentation below: