uprgade 7.5.3 -> 7.5.4: invalid value of psa_server_ip

[seehundnz]

Hi!

I just upgraded Plesk 7.5.3 -> 7.5.4 using the autoinstaller on a Suse 9.1 System. The old Version seemed to work without any problems.
Just after the upgrade i get this error message when using some features of Plesk.
E.g. I get this message:

Internal Plesk error occurred: Unable to generate data: Unable to get system data: invalid value of psa_server_ip = ''

when trying to view the certificates of a domain.
Same thing happens when I click on "Extras".

Does anyone know where to set this value or how to fix the problem?

Thanks