Here (https://github.com/droolsjbpm/drools/blob/master/drools-persistence-jpa/src/main/java/org/drools/persistence/jpa/KnowledgeStoreServiceImpl.java#L127) is incompatible constructor with KnowledgeBase instead of KieBase which causes the exception. Other methods that are using the constructor should be fixed as well.

FYI I create the session this way:

ksession = JPAKnowledgeService.newStatefulKnowledgeSession(kbase, null, env); // where kbase is instance of injected KieBase