/usr/bin/x2goclient:11:privatekey_from_file:SshMasterConnection::userAuthWithKey:SshMasterConnection::userAuth:SshMasterConnection::run:QThreadPrivate::start

The Ubuntu Error Tracker has been receiving reports about a problem regarding x2goclient. This problem was most recently seen with package version 4.1.0.0-1, the problem page at https://errors.ubuntu.com/problem/76e82834b1437fbfd572be2126dbb769023d3e0e contains more details, including versions of packages affected, stacktrace or traceback, and individual crash reports.
If you do not have access to the Ubuntu Error Tracker and are a software developer, you can request it at http://forms.canonical.com/reports/.