I just tried to upgrade from RC 30 to RC 35.  When I did, I have no GUI, but it appears everything else is up and running (can view my dockers, telnet, and access shares).  I reverted to RC 30, and I still had no GUI, but I was able to restart NGINX from the command line in /etc/rc.d.  So I reinstalled RC 35, and same issue, no GUI.  I tried starting the GUI from the command line, and could only get a 500 error.   I didn't see anything in the syslog that stood out to me, so I'm hoping someone el