Hello Franz,
In #628 you wrote
But when I say # apt-get download x2goclient I get x2goclient_3.99.2.1-5_armhf.deb And this version makes a lot of problems with an X2goserver 4.0.1.16.
It remains unclear in #644 if you are still trying to use client 3.99.2.1-5_armhf.deb.
Please, provide both for x2goserver and x2goclient the version, the architecture, the Linux distribution, and the apt repository you are using.
Best regards
Heinrich Schuchardt