The VPN used to work properly even after upgrade from Ubuntu 14.04 to 16.04. However after the major update I get "JRE not installed/Java is disabled" both in Firefox and Chromium.
I checked the link /usr/bin/update-alternatives is in place, java32 is installed. I even tried to re-install these packages
sudo apt-get install libstdc++6:i386 lib32z1 lib32ncurses5 lib32bz2-1.0 libxext6:i386 libxrender1:i386 libxtst6:i386 libxi6:i386
as suggested here, but they are up-to-date. From this list only libstdc++6 has been updated (apt-get dist-upgrade):
libstdc++6:amd64 (5.4.0-6ubuntu1~16.04.2, 5.4.0-6ubuntu1~16.04.4),libstdc++6:i386 (5.4.0-6ubuntu1~16.04.2, 5.4.0-6ubuntu1~16.04.4)
but I'm not sure how that affect Java visibility
There is a huge list of other updated packages in the /var/log/apt/history.log, and it's hard to identify which one caused the problem.