x2go login failure

I am having trouble logging onto X2go. It’s running on OpenSuse 42.3 and I’m trying to connect from OpenSuse 42.3.

I have a windows machine and VM, which both work fine. However, when I try to use OpenSuse I get an error “Could not establish connection to the remote proxy. Do you want to terminate the current session?”

If I run x2goclient --debug, this scrolls by until I kill the process:
x2go-DEBUG-…/src/onmainwindow.cpp:12980> “Searching window with title: X2GO-paul-50-1512423311_stDKDE_dp24”
x2go-DEBUG-…/src/onmainwindow.cpp:11370> “Searching proxy window: X2GO-paul-50-1512423311_stDKDE_dp24”
x2go-DEBUG-…/src/onmainwindow.cpp:12980> “Searching window with title: X2GO-paul-50-1512423311_stDKDE_dp24”
x2go-DEBUG-…/src/onmainwindow.cpp:11370> “Searching proxy window: X2GO-paul-50-1512423311_stDKDE_dp24”
x2go-DEBUG-…/src/onmainwindow.cpp:12980> “Searching window with title: X2GO-paul-50-1512423311_stDKDE_dp24”

Any ideas? I’m leaning towards this being a client issue, since I can connect to the server from Windows.

I’ve applied all updates.