Ok I figured it out. Indeed the problem was a routing issue. I
I first added a route in my VPN Client software(Draytek Smart VPN client) andnoted that it worked . I could have connected to resources behind the Pfsense box.
Since that worked I furgured that I'd try to reconfigure the VPN Server. I put the IP address of the VPN server withe the same network as the LAN( 192.168.12.2). That did the trick.
Thanks for your support.