after upgrading our OTRS from version 3.3.8 to 4.0.6 the bulk action got broken. When selecting a ticket and clicking on the "bulk action" button an internal server error is thrown. The httpd error log includes exactly these entries:
Any idea why this might happen?[Thu Apr 9 13:30:41 2015] -e: (in cleanup) Can't call method "Get" on an undefined value at /opt/otrs//Kernel/System/AuthSess
ion/DB.pm line 583.
[Thu Apr 9 13:30:41 2015] -e: (in cleanup) Can't call method "Get" on an undefined value at /opt/otrs//Kernel/System/EventHan
dler.pm line 170.
[Thu Apr 09 13:30:41 2015] [error] Can't call method "StateGet" on an undefined value at /opt/otrs//Kernel/Modules/AgentTicketB
ulk.pm line 766.\n\t(in cleanup) Can't call method "Get" on an undefined value at /opt/otrs//Kernel/System/AuthSession/DB.pm li
ne 583.\n\t(in cleanup) Can't call method "Get" on an undefined value at /opt/otrs//Kernel/System/EventHandler.pm line 170.\n