Sub single benchmark fails w/ Easy calculator

Exception in thread "main" org.optaplanner.benchmark.api.PlannerBenchmarkException: Benchmarking failed: failureCount (11). The exception of the firstFailureSingleBenchmarkRunner (demo01_coachShuttleGathering Easy (Java)_0) is chained.
	at org.optaplanner.benchmark.impl.DefaultPlannerBenchmark.benchmarkingEnded(DefaultPlannerBenchmark.java:325)
	at org.optaplanner.benchmark.impl.DefaultPlannerBenchmark.benchmark(DefaultPlannerBenchmark.java:100)
	at org.optaplanner.benchmark.impl.DefaultPlannerBenchmark.benchmarkAndShowReportInBrowser(DefaultPlannerBenchmark.java:423)
	at org.optaplanner.examples.app.ScoreDirectorFactoryBenchmarkApp.main(ScoreDirectorFactoryBenchmarkApp.java:190)
Caused by: java.lang.IllegalStateException: When constraintMatchEnabled (false) is disabled, this method should not be called.
	at org.optaplanner.core.impl.score.DefaultScoreManager.explainScore(DefaultScoreManager.java:62)
	at org.optaplanner.core.impl.score.DefaultScoreManager.getSummary(DefaultScoreManager.java:52)
	at org.optaplanner.benchmark.impl.SubSingleBenchmarkRunner.call(SubSingleBenchmarkRunner.java:127)
	at org.optaplanner.benchmark.impl.SubSingleBenchmarkRunner.call(SubSingleBenchmarkRunner.java:35)
	at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
	at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
	at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
	at java.base/java.lang.Thread.run(Thread.java:834)