javafx.scene.control.skin.MenuButtonSkinBase.lambda$new$7.class java.lang.NullPointerException: null
at javafx.scene.control.skin.MenuButtonSkinBase.lambda$new$7(MenuButtonSkinBase.java:188)
at com.sun.javafx.application.PlatformImpl.lambda$runLater$10(PlatformImpl.java:428)
at java.security.AccessController.doPrivileged(AccessController.java)
at com.sun.javafx.application.PlatformImpl.lambda$runLater$11(PlatformImpl.java:427)
at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:96)
at com.sun.glass.ui.win.WinApplication._runLoop(WinApplication.java)
at com.sun.glass.ui.win.WinApplication.lambda$runLoop$3(WinApplication.java:174)
at java.lang.Thread.run(Thread.java:834)
We editing a game.project, opened the location of a file in explorer, then returned to editor and this error popped up
Duplicate of #2572.