vpn – Troubleshooting Pfsense OpenVPN

I'm trying to setup a Pfsense OpenVPN tunnel and I'm having problems. I installed them several times without problems, but this environment has unique constraints.

Currently, I log in to the firewall and get an IP address, but I can not send a ping through the tunnel. (The firewall rules are in place – here).

dev tun
persist-tun
persistence key
AES-128-CBC encryption (TESTING WITH MULTIPLE CIPHERS)
auth SHA256
tls client
customer
resolve-retry infinite
remote control XX.XX.XX.XX 1194 UDP
lport 0
verify-x509-name name "Open-VPN-ServerCert"
auth-user-pass
remote certificate server

The modem has 5 static IP addresses and OpenVPN will run on a static IP address. However, there is a Ubiquiti firewall running a VPN l2tp on another static IP address. Is this a viable scenario or will it interfere with the Open-Vpn tunnel? Should I sometimes add a special rule for routing or nat?