[X2Go-User] x2go: Unable to find free display port or insert new session into database (revisited)

[Jeff Sadowski]

I found some good information here
https://unix.stackexchange.com/questions/467507/x2go-unable-to-find-free-display-port-or-insert-new-session-into-database
but "x2godbadmin --recreate"  is not working for me.
I removed every package I could think of that might be interfering and
purged them (x2go*, xorg*, nvidia, cuda, xvfb, ...) then reinstalled with
no luck
any time I try and connect I get Unable to find free display port or insert
new session into database message.
I am using ubuntu 16.04 I can not find what is preventing it on this one
system. How can I enable more debugging so I can figure out what is going
wrong?

Jan 21 16:12:46 euler /usr/bin/x2gostartagent: unable to insert display
port into database. Retrying (run 1).
Jan 21 16:12:47 euler /usr/bin/x2gostartagent: unable to insert display
port into database. Retrying (run 2).
Jan 21 16:12:48 euler /usr/bin/x2gostartagent: unable to insert display
port into database. Retrying (run 3).
Jan 21 16:12:49 euler /usr/bin/x2gostartagent: unable to insert display
port into database. Retrying (run 4).
Jan 21 16:12:50 euler /usr/bin/x2gostartagent: unable to insert display
port into database. Retrying (run 5).
Jan 21 16:12:50 euler /usr/bin/x2gostartagent: unable to insert display
port into database. Retrying (run 6).
Jan 21 16:12:51 euler /usr/bin/x2gostartagent: unable to insert display
port into database. Retrying (run 7).
Jan 21 16:12:52 euler /usr/bin/x2gostartagent: unable to insert display
port into database. Retrying (run 8).
Jan 21 16:12:53 euler /usr/bin/x2gostartagent: unable to insert display
port into database. Retrying (run 9).
Jan 21 16:12:54 euler /usr/bin/x2gostartagent: unable to insert display
port into database. Retrying (run 10).
Jan 21 16:12:54 euler /usr/bin/x2gostartagent: Unable to find free display
port or insert new session into database; parameters: port (51), hostname
(euler) and session name (jsadowski-51-1579648373_stDXFCE_dp24).

It seems I am missing a package or more and I can not figure out which ones.
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