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java.lang.NullPointerException at jmri.InstanceManager.setDefault(InstanceManager.java:235) at jmri.managers.ManagerDefaultSelector.configure(ManagerDefaultSelector.java:159) at jmri.managers.ManagerDefaultSelector.initialize(ManagerDefaultSelector.java:214) at jmri.implementation.JmriConfigurationManager.initializeProvider(JmriConfigurationManager.java:249) at jmri.implementation.JmriConfigurationManager.lambda$2(JmriConfigurationManager.java:245) at java.util.ArrayList$ArrayListSpliterator.forEachRemaining(Unknown Source) at java.util.stream.ReferencePipeline$Head.forEach(Unknown Source) at jmri.implementation.JmriConfigurationManager.initializeProvider(JmriConfigurationManager.java:244) at jmri.implementation.JmriConfigurationManager.lambda$1(JmriConfigurationManager.java:178) at java.util.ArrayList$ArrayListSpliterator.forEachRemaining(Unknown Source) at java.util.stream.ReferencePipeline$Head.forEach(Unknown Source) at jmri.implementation.JmriConfigurationManager.load(JmriConfigurationManager.java:177) at jmri.implementation.JmriConfigurationManager.load(JmriConfigurationManager.java:166) at apps.Apps.<init>(Apps.java:266) at apps.PanelPro.PanelPro.<init>(PanelPro.java:41) at apps.PanelPro.PanelPro.main(PanelPro.java:98)