I have followed a setup on both this site and the Surfshark website to setup OpenVPN client on my device.
I can see in the system logs that the VPN is connecting and all my config files for the firewall / network / interfaces are all right according to this https://support.surfshark.com/hc/en-us/articles/360010347939-How-to-set-up-a-router-with-OpenWRT?utm_source=impact&utm_medium=123201&utm_campaign=Online%20Tracking%20Link&clickid=S%3AnWJLw3axyIT5d3-OWM4RvKUkGUbbQNGS8lws0&irgwc=1
When I then try any connection either direct from my client to an external address, or from my OpenWRT device to any address it is failing. Is there a common mistake I may be making?