java.lang.NoClassDefFoundError: org/kie/internal/builder/conf/ParallelRulesBuildThresholdOption
	at org.drools.compiler.builder.impl.KnowledgeBuilderConfigurationImpl.<init>(KnowledgeBuilderConfigurationImpl.java:112)
	at org.drools.compiler.kie.builder.impl.AbstractKieProject.getBuilderConfiguration(AbstractKieProject.java:284)
	at org.drools.compiler.kie.builder.impl.AbstractKieProject.createKnowledgeBuilder(AbstractKieProject.java:270)
	at org.drools.compiler.kie.builder.impl.AbstractKieProject.buildKnowledgePackages(AbstractKieProject.java:208)
	at org.drools.compiler.kie.builder.impl.AbstractKieProject.verify(AbstractKieProject.java:74)
	at org.drools.compiler.kie.builder.impl.KieBuilderImpl.buildKieProject(KieBuilderImpl.java:353)
	at org.drools.compiler.kie.builder.impl.KieBuilderImpl.buildAll(KieBuilderImpl.java:265)
	at org.drools.compiler.kie.builder.impl.KieBuilderImpl.buildAll(KieBuilderImpl.java:209)
	at org.optaplanner.core.config.score.director.ScoreDirectorFactoryConfig.buildDroolsScoreDirectorFactory(ScoreDirectorFactoryConfig.java:503)
	at org.optaplanner.core.config.score.director.ScoreDirectorFactoryConfig.buildScoreDirectorFactory(ScoreDirectorFactoryConfig.java:331)
	at org.optaplanner.core.config.solver.SolverConfig.buildSolver(SolverConfig.java:220)
	at org.optaplanner.core.impl.solver.AbstractSolverFactory.buildSolver(AbstractSolverFactory.java:61)
	at org.optaplanner.openshift.employeerostering.server.solver.WannabeSolverManager.lambda$solve$2(WannabeSolverManager.java:81)
	at org.jboss.as.ee.concurrent.ControlPointUtils$ControlledRunnable.run(ControlPointUtils.java:105)
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	at org.glassfish.enterprise.concurrent.internal.ManagedFutureTask.run(ManagedFutureTask.java:141)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)
	at org.glassfish.enterprise.concurrent.ManagedThreadFactoryImpl$ManagedThread.run(ManagedThreadFactoryImpl.java:250)
Caused by: java.lang.ClassNotFoundException: org.kie.internal.builder.conf.ParallelRulesBuildThresholdOption from [Module "deployment.ROOT.war:main" from Service Module Loader]
	at org.jboss.modules.ModuleClassLoader.findClass(ModuleClassLoader.java:198)
	at org.jboss.modules.ConcurrentClassLoader.performLoadClassUnchecked(ConcurrentClassLoader.java:363)
	at org.jboss.modules.ConcurrentClassLoader.performLoadClass(ConcurrentClassLoader.java:351)
	at org.jboss.modules.ConcurrentClassLoader.loadClass(ConcurrentClassLoader.java:93)
... 21 more