vgb-bin fails to start on FreeBSD 13.0 on amd64.
From the website, this version is very old and there is a new version released last year. I suggest let's check with the author to see if he can open source or build a new binary for FreeBSD.
This won't run on amd64 since it required i386 dependencies and there's not supported way to have these installed on amd64 system. Marking as ONLY_FOR_ARCHS.
A commit references this bug: Author: amdmi3 Date: Mon Mar 15 17:40:09 UTC 2021 New revision: 568481 URL: https://svnweb.freebsd.org/changeset/ports/568481 Log: Mark as only for i386 This requires compatible (e.g. i386) X11 libraries, and there's no supported way to have i386 packages on amd64 system. PR: 233877 Reported by: 0mp Changes: head/emulators/vgb-bin/Makefile