Dynamic DNS Issue

[FallenSky]

Hello, I have installed SoftEther VPN Server on a pfSense box (FreeBSD).
My ISP changed my public IP recently but vpnXXX.softether.net still points to an old IP.
The problem is when I connect to my server and run a command DynamicDNSGetStatus there is an error code 33.
Unsupported.
What should I do to make it running?

[solo]

Restart SE service.

[gbrooks1911]

Where did you find instructions for installing softether on the pfsense?