New Connection problem - ERR_04269 ATTRIBUTE_TYPE for OID ads-basedn does not exist

Setup a new, first Connection. Then try to "Open Configuration" - doesn't work - error message in the summary and here the detailed error message:

org.apache.directory.api.ldap.model.exception.LdapNoSuchAttributeException: ERR_04269 ATTRIBUTE_TYPE for OID ads-basedn does not exist!
at org.apache.directory.api.ldap.model.schema.registries.DefaultAttributeTypeRegistry.lookup(DefaultAttributeTypeRegistry.java:293)
at org.apache.directory.api.ldap.model.schema.registries.DefaultAttributeTypeRegistry.lookup(DefaultAttributeTypeRegistry.java:47)
at org.apache.directory.api.ldap.schemamanager.impl.DefaultSchemaManager.lookupAttributeTypeRegistry(DefaultSchemaManager.java:1604)
at org.apache.directory.api.ldap.model.entry.DefaultEntry.<init>(DefaultEntry.java:311)
at org.apache.directory.studio.apacheds.configuration.v2.jobs.LoadConfigurationRunnable.readConfiguration(LoadConfigurationRunnable.java:359)
at org.apache.directory.studio.apacheds.configuration.v2.jobs.LoadConfigurationRunnable.getConfiguration(LoadConfigurationRunnable.java:182)
at org.apache.directory.studio.apacheds.configuration.v2.jobs.LoadConfigurationRunnable.run(LoadConfigurationRunnable.java:127)
at org.apache.directory.studio.common.core.jobs.StudioJob.run(StudioJob.java:83)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)
Caused by: org.apache.directory.api.ldap.model.exception.LdapException: ERR_04269 ATTRIBUTE_TYPE for OID ads-basedn does not exist!
at org.apache.directory.api.ldap.model.schema.registries.DefaultSchemaObjectRegistry.lookup(DefaultSchemaObjectRegistry.java:176)
at org.apache.directory.api.ldap.model.schema.registries.DefaultAttributeTypeRegistry.lookup(DefaultAttributeTypeRegistry.java:289)
... 8 more