AWS VPN Client on Linux Ubuntu not working

We have a VPN setup and everything works fine for other person.

But I have a Linux with Ubuntu, and client can connect, but I cannot acceess services.

telnet told me DNS cannot be resolved. Using curl to hit services with their internal ip (10.0.0.150) doesn't work.

I followed the troubleshooting for Linux but didn't help.

Logs told me push message has been received from server (DNS 10.0.0.2, routes etc....)

The 2nd weird part is that we enabled split tunnel, and it should not pass through VPC. However it is