gvm-start is used to start all the daemons and opens the default browser at the end with “xdg-open “${URL}” 2>/dev/null >/dev/null &”
The problem here is, that the browser ist startet as root which is not recommended and that root does not have an environment on my Kali Linux.
Workaround:
I patched gvm-start and changed the line that starts the browser from
xdg-open “${URL}” 2>/dev/null >/dev/null &
to
runuser -u “$SUDO_USER” xdg-open “${URL}” 2>/dev/null >/dev/null &