Undefined subroutine &net::active_interfaces virtual-server-lib-funcs.pl

I have installed 1.340 with virtual-server 3.39.
I go to Edit Virtual Server. I then go to Configurable Settings.
I get a 500 error.
I also get the message.
Undefined subroutine &net::active_interfaces virtual-server-lib-funcs.pl at line 2292.

Status: 
Closed (fixed)