When we log into the assigned customer's CP and select one of subscriptions, PBA-S crashes with an Application Error and we cannot take any further actions (neither in the CP nor in the PCC) because PBA-S loads itself to death.
The issue exists for customer account #CUS_ID, here is the log:
/var/log/hspc/hspc.log ---8<--- [2013/10/18 18:35:54] [DEBUG]  [HSPC::WebSystem::reinit_security] LOGIN:try to login to account # CUS_ID, result=HSPC::WebSecurity=HASH(0x202e027c) ... [2013/10/18 18:35:54] [FATAL]  [Error::throw] error while running: reqiure HSPC::CP::Menu::Server; HSPC::CP::Menu::Server->dash_home(menu, ARRAY(0x204cf6b0), mode, ); called from package HSPC::CP::Menu at line 88 $@: Can't call method "timezone" on an undefined value at /usr/lib/perl5/site_perl/5.8.8/HSPC/WebSystem.pm line 701. --->8---
The problem is likely caused by customer misconfiguration: link "Log in to CP" exists, but User account is missing.
Normally, the "Log in to CP" link should be hidden if there is no user account.
Create User account:
Top > Account Director > Customer Manager > Customers > #CUS_ID > Users > Add New User