I'm not sure if this is the same issue as bug https://sourceforge.net/p/pacmanager/bugs/273/...
If this is the same problem as bug 273 https://sourceforge.net/p/pacmanager/bugs/273/...
I found a fix to this problem. In /opt/pac/lib/PACMain.pm on line 3477, change $$self{_GUI}{main}...