Error in QueryAPI using exists

Using this query for users in an expression results in an IllegalArgumentException

prismContext.queryFor(UserType.class).exists(F_ROLE_MEMBERSHIP_REF, T_OBJECT_REFERENCE).item(F_NAME).eq(„TestRolle“).build().

The same query as XML executed in the query playground does not cause any errors.

<query>
    <filter>
      <exists>
         <path>roleMembershipRef/@</path>
         <filter>
            <equal>
               <path>name</path>
               <value>TestRolle</value>
            </equal>
         </filter>
      </exists>
    </filter>
</query>