[SOGo] WebUI doesn't start completely

["Christian@Mail"]

Hi everybody,

after new install from scratch the WebUI doesn't start completely. I got 
white page only instead of login page.

System: Debian 12, nginx, mariadb, sogo

The sogo.log looks like:

sogod [187495]: <0x0x55a6c4cf67f0[SOGoProductLoader]> SOGo products 
loaded from '/usr/lib/GNUstep/SOGo':
sogod [187495]: <0x0x55a6c4cf67f0[SOGoProductLoader]> CommonUI.SOGo, 
MainUI.SOGo, ActiveSync.SOGo, Appointments.SOGo, Mailer.SOGo, 
SchedulerUI.SOGo, MailerUI.SOGo, MailPartViewers.SOGo, ContactsUI.SOGo, 
PreferencesUI.SOGo, Contacts.SOGo, AdministrationUI.SOGo
sogod [187495]: All products loaded - current memory usage at 98 MB

I can see only one error:
sogod[187501:187501] EXCEPTION: <NSException: 0x55a6c4eecfb0> 
NAME:NSInvalidArgumentException REASON:Tried to add nil value for key 
'directory' to dictionary INFO:{}

By any chance any ideas how can I fix that?

Thanks

Christian