[info]   java.lang.NullPointerException:
[info]   at org.optaplanner.core.config.util.ConfigUtils.resolveThreadPoolSizeScript(ConfigUtils.java:268)
[info]   at org.optaplanner.core.config.solver.SolverConfig.resolveMoveThreadCount(SolverConfig.java:310)
[info]   at org.optaplanner.core.config.solver.SolverConfig.buildSolver(SolverConfig.java:250)
[info]   at org.optaplanner.core.impl.solver.AbstractSolverFactory.buildSolver(AbstractSolverFactory.java:61)
[info]   at SchoolYearScheduleSolverSpec.$anonfun$new$1(SchoolYearScheduleSolverSpec.scala:19)
[info]   at org.scalatest.OutcomeOf.outcomeOf(OutcomeOf.scala:85)
[info]   at org.scalatest.OutcomeOf.outcomeOf$(OutcomeOf.scala:83)
[info]   at org.scalatest.OutcomeOf$.outcomeOf(OutcomeOf.scala:104)
[info]   at org.scalatest.Transformer.apply(Transformer.scala:22)
[info]   at org.scalatest.Transformer.apply(Transformer.scala:20)