Per the reply in this thread:
https://community.freepbx.org/t/sangoma-phones-free-epm-vpn/47727/4
upgrading EPM from Edge does resolve the issue; the VPN client is available from the dropdown in EPM.
Now I have the VPN connected, and I just have to figure out how to make it register with my PBX. That’s another problem, and possibly another post; I have a few things to try first 