Look like you have some weird routes: 0.0.0.0/1 + 0.0.0.0/24 should not be there.
Can you ping 10.8.0.1 or 10.8.0.2 (depending on which one is your OpenVPN Server gateway?)
If you could mask your OpenVPN config and post it here it would be of help for future users trying to accomplish the same thing as you, as well as help with troubleshooting.
What does a 'traceroute 10.8.0.3' output if run from the server?
What does a 'traceroute 10.8.0.1 / 2' <- (whichever is the IP for the VPN GW) output if run from the ER?