TLS Error: TLS handshake failed

Hi,

I have problem with OpenVPN. When I try to connect with the VPN, I receive an error on the client "TLS handshake failed".
On the PFSense log, I have this error.

==================
Oct 6 19:22:25 openvpn[36150] Re-using SSL/TLS context
Oct 6 19:22:25 openvpn[36150] TCP connection established with XX.XX.XX.XX:23007
Oct 6 19:22:25 openvpn[36150] TCPv4_SERVER link local: [undef]
Oct 6 19:22:25 openvpn[36150] TCPv4_SERVER link remote XX.XX.XX.XX:23007
Oct 6 19:22:25 openvpn[36150] XX.XX.XX.XX:23007 TLS Error: TLS key negotiation failed to occur within 60 seconds (check your network connectivity)
Oct 6 19:22:25 openvpn[36150] XX.XX.XX.XX:23007 TLS Error: TLS handshake failed
Oct 6 19:22:25 openvpn[36150] XX.XX.XX.XX:23007 Fatal TLS error (check_tls_errors_co), restarting
=================

The problem is only port 1194 is open on the front end firewall and we can't open any other port.
Any suggestion?

Thanks!