On the X2Go user mailing list a new contributor brought up the issue that one of his users could not start up X2Go sessions. The user’s default shell is set to /usr/bin/tcsh and this cannot be changed for internal reasons.
I dived into that issue and discovered that it occurs with both clients (X2Go Client, PyHoca-*). The issue got fixed today, nightly built packages are available very soon from now. The fixes will be in these to-be-released versions: python-x2go >= 0.2.0.9, x2goclient >= 188.8.131.52.