Aris 9.8 Design Server databases not expanding

Hello, we are working for a while now with Aris 9.8 Design Server. Since a few days we cannot expand the databases that are in the configuration.

Thre are no alerts when you make a connection with the Aris 9.8 Architect & Designer client.

Als databases are show, but when you click on the icon before the database to expand it, nothing happens.

Any thoughts? Wrong Java version? Old odbc driver?

Regards