java.lang.NullPointerException: This exception has no message.

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java.lang.NullPointerException:
at com.codename1.ui.List.renderComponent(List.java:1445)
at com.codename1.ui.List.paint(List.java:1386)
at com.codename1.ui.Component.internalPaintImpl(Component.java:1317)
at com.codename1.ui.Component.paintInternalImpl(Component.java:1297)
at com.codename1.ui.Component.paintInternal(Component.java:1272)
at com.codename1.ui.Container.paint(Container.java:1342)
at com.codename1.ui.Component.internalPaintImpl(Component.java:1323)
at com.codename1.ui.Component.paintInternalImpl(Component.java:1297)
at com.codename1.ui.Component.paintInternal(Component.java:1272)
at com.codename1.ui.Container.paint(Container.java:1342)
at com.codename1.ui.Component.internalPaintImpl(Component.java:1323)
at com.codename1.ui.Component.paintInternalImpl(Component.java:1297)
at com.codename1.ui.Component.paintInternal(Component.java:1272)
at com.codename1.ui.Container.paint(Container.java:1342)
at com.codename1.ui.Form.paint(Form.java:3109)
at com.codename1.ui.Component$BGPainter.paint(Component.java:5249)
at com.codename1.ui.Component.paintBackgroundImpl(Component.java:1696)
at com.codename1.ui.Component.paintComponentBackground(Component.java:1655)
at com.codename1.ui.Container.paintComponentBackground(Container.java:2170)
at com.codename1.ui.Component.internalPaintImpl(Component.java:1308)
at com.codename1.ui.Form.internalPaintImpl(Form.java:3119)
at com.codename1.ui.Component.paintInternalImpl(Component.java:1297)
at com.codename1.ui.Component.paintInternal(Component.java:1272)
at com.codename1.ui.Component.paintInternal(Component.java:1240)
at com.codename1.ui.Component.paintComponent(Component.java:1525)
at com.codename1.ui.animations.CommonTransitions.paint(CommonTransitions.java:1164)
at com.codename1.ui.animations.CommonTransitions.paint(CommonTransitions.java:1154)
at com.codename1.ui.animations.CommonTransitions.initTransition(CommonTransitions.java:461)
at com.codename1.ui.Display.initTransition(Display.java:1425)
at com.codename1.ui.Display.setCurrent(Display.java:1384)
at com.codename1.ui.Form.showModal(Form.java:1808)
at com.codename1.ui.Dialog.showModal(Dialog.java:1048)
at com.codename1.ui.Dialog.show(Dialog.java:516)
at com.codename1.ui.Dialog.showPackedImpl(Dialog.java:1350)
at com.codename1.ui.Dialog.showPacked(Dialog.java:1258)
at com.codename1.ui.Dialog.showImpl(Dialog.java:1004)
at com.codename1.ui.Dialog.show(Dialog.java:982)
at com.codename1.ui.Dialog.show(Dialog.java:938)
at com.codename1.ui.Dialog.show(Dialog.java:727)
at com.codename1.ui.Dialog.show(Dialog.java:680)
at com.codename1.ui.Dialog.show(Dialog.java:645)
at com.codename1.ui.Dialog.show(Dialog.java:586)
at com.codename1.ui.Dialog.show(Dialog.java:741)
at com.codename1.ui.Display.mainEDTLoop(Display.java:1009)
at com.codename1.ui.RunnableWrapper.run(RunnableWrapper.java:120)
at com.codename1.impl.CodenameOneThread.run(CodenameOneThread.java:176)

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