I just installed trial version to test and probably buy the official one and everything was perfect until i tried to create a new account that returned a 502 Bad Gateway Error.
All i see in the logs is this:

[09-Sep-2014 23:41:55] NOTICE: fpm is running, pid 18227
[09-Sep-2014 23:41:55] NOTICE: ready to handle connections
[09-Sep-2014 23:53:45] WARNING: [pool webintf] child 18228 exited on signal 11 (SIGSEGV) after 709.792455 seconds from start
[09-Sep-2014 23:53:45] NOTICE: [pool webintf] child 19475 started
[09-Sep-2014 23:54:47] WARNING: [pool webintf] child 18231 exited on signal 11 (SIGSEGV) after 771.746848 seconds from start
[09-Sep-2014 23:54:47] NOTICE: [pool webintf] child 19487 started
[10-Sep-2014 00:01:09] WARNING: [pool webintf] child 19391 exited on signal 11 (SIGSEGV) after 876.050797 seconds from start
[10-Sep-2014 00:01:09] NOTICE: [pool webintf] child 19710 started
[10-Sep-2014 00:02:25] WARNING: [pool webintf] child 19487 exited on signal 11 (SIGSEGV) after 457.692341 seconds from start
[10-Sep-2014 00:02:25] NOTICE: [pool webintf] child 19721 started
[10-Sep-2014 00:03:12] NOTICE: Terminating ...
[10-Sep-2014 00:03:12] NOTICE: exiting, bye-bye!
[10-Sep-2014 00:03:51] NOTICE: fpm is running, pid 2523
[10-Sep-2014 00:03:51] NOTICE: ready to handle connections
[10-Sep-2014 00:04:39] WARNING: [pool webintf] child 2525 exited on signal 11 (SIGSEGV) after 48.007803 seconds from start
[10-Sep-2014 00:04:39] NOTICE: [pool webintf] child 2582 started
[10-Sep-2014 00:08:04] WARNING: [pool webintf] child 2526 exited on signal 11 (SIGSEGV) after 253.643284 seconds from start
[10-Sep-2014 00:08:04] NOTICE: [pool webintf] child 2633 started
[10-Sep-2014 00:09:36] NOTICE: Terminating ...
[10-Sep-2014 00:09:36] NOTICE: exiting, bye-bye!
[10-Sep-2014 00:09:36] ERROR: Unable to remove the PID file (/usr/local/centovacast/var/run/cc-appserver.pid).: No such file or directory (2)
[10-Sep-2014 00:09:37] NOTICE: fpm is running, pid 2733
[10-Sep-2014 00:09:37] NOTICE: ready to handle connections
[10-Sep-2014 00:10:09] WARNING: [pool webintf] child 2735 exited on signal 11 (SIGSEGV) after 31.815495 seconds from start
[10-Sep-2014 00:10:09] NOTICE: [pool webintf] child 2783 started
[10-Sep-2014 00:14:07] WARNING: [pool webintf] child 2783 exited on signal 11 (SIGSEGV) after 238.550152 seconds from start
[10-Sep-2014 00:14:07] NOTICE: [pool webintf] child 2833 started

Same problem!

I need to solve this urgently. But even you still couldn't get a reply for almost a month!

I tried fixing permissions, restarting server, checking if multiple crond is running... nothing worked. I still cannot create an account .The problem is same with yours.

....
[06-Nov-2014 11:00:28] NOTICE: [pool webintf] child 12639 started
[06-Nov-2014 11:03:00] NOTICE: Terminating ...
[06-Nov-2014 11:03:00] NOTICE: exiting, bye-bye!
[06-Nov-2014 11:04:18] NOTICE: fpm is running, pid 1732
[06-Nov-2014 11:04:18] NOTICE: ready to handle connections
[06-Nov-2014 11:05:53] WARNING: [pool webintf] child 1737 exited on signal 11 (SIGSEGV) after 94.774318 seconds from start
[06-Nov-2014 11:05:53] NOTICE: [pool webintf] child 3055 started
...

Hello,

i have the same problem.

Help please.

To reiterate the notices posted all over the forums, this is not an official support venue and you cannot expect to receive a staff response here. If this issue is affecting you, please open a ticket. We need much more detail in order to diagnose this.