GroupWise 2014R2, System, Link Configuration empty

Hi all,

I have my GW2014R2 running without functional issues on the SLES11sp3/OES11sp2 host.
Just browsing through the administration pages after the upgrade, I find that the "Link Configuration" page pops up completely empty - that is:
- Domain name shown in left Source column
- Post Office name shown in right Destination column

Nothing else.:confused:
- No information
- No buttons (except from Close)

The system is a single domain and single po on same server.

Any ideas where to look?