User group search is not working

This issue affects version 7.7 only.

Performing a search on the CMS (admin --> control panel --> groups) throws the following error:

[INFO] [talledLocalContainer] 21.05.2014 09:50:01 ERROR [org.hippoecm.frontend.plugins.cms.admin.SearchableDataProvider.populateList():175] Error while executing query: SELECT * FROM hipposys:group WHERE (hipposys:system <> 'true' OR hipposys:system IS NULL) OR ( fn:name() = 'admin' OR contains(hipposys:description, 'admin' ) contains(hipposys:members, 'admin') OR contains(hipposys:groups, 'admin') )
[INFO] [talledLocalContainer] javax.jcr.query.InvalidQueryException: Encountered "contains" at line 1, column 166.