Won't open after update to 12 on CentOS 7
Running CentOS 7.2 w/TV12 (gnome desktop)
I upgraded to TV 12 (RPM installer) from TV11 which was working fine on the host. While it appeared to upgrade without a problem, TeamVIewer will now no longer open (GUI). The service and daemon are both running, no errors, but the GUI never launches at all. I've restarted several times, removed TV entirely, reinstalled 11 (which now no longer works either), removed again, re-installed 12, same result.
I have 6 other identical servers which are running TeamViewer 11 and 12 without a problem. I logged a support case but I'm hoping someone has some insight to point me in the right direction here.