java.lang.NullPointerException: null

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java.lang.NullPointerException: null
at org.terasology.rendering.nui.layers.mainMenu.SelectModulesScreen.setSelectedVersions(SelectModulesScreen.java:289)
at org.terasology.rendering.nui.layers.mainMenu.SelectModulesScreen.initialise(SelectModulesScreen.java:84)
at org.terasology.rendering.nui.CoreScreenLayer.onOpened(CoreScreenLayer.java:72)
at org.terasology.rendering.nui.internal.NUIManagerInternal.prepare(NUIManagerInternal.java:506)
at org.terasology.rendering.nui.internal.NUIManagerInternal.pushScreen(NUIManagerInternal.java:238)
at org.terasology.rendering.nui.internal.NUIManagerInternal.pushScreen(NUIManagerInternal.java:202)
at org.terasology.rendering.nui.internal.NUIManagerInternal.pushScreen(NUIManagerInternal.java:191)
at org.terasology.rendering.nui.layers.mainMenu.CreateGameScreen$9.onActivated(CreateGameScreen.java:217)
at org.terasology.rendering.nui.widgets.UIButton.activate(UIButton.java:138)
at org.terasology.rendering.nui.widgets.UIButton.access$100(UIButton.java:40)
at org.terasology.rendering.nui.widgets.UIButton$1.onMouseRelease(UIButton.java:81)
at org.terasology.rendering.nui.internal.CanvasImpl.processMouseRelease(CanvasImpl.java:226)
at org.terasology.rendering.nui.internal.NUIManagerInternal.mouseButtonEvent(NUIManagerInternal.java:425)
at org.terasology.rendering.nui.internal.NUIManagerInternalMethodAccess.invoke(Unknown Source)
at org.terasology.entitySystem.event.internal.EventSystemImpl$ByteCodeEventHandlerInfo.invoke(EventSystemImpl.java:497)
at org.terasology.entitySystem.event.internal.EventSystemImpl.sendConsumableEvent(EventSystemImpl.java:278)
at org.terasology.entitySystem.event.internal.EventSystemImpl.send(EventSystemImpl.java:257)
at org.terasology.entitySystem.entity.internal.BaseEntityRef.send(BaseEntityRef.java:166)
at org.terasology.input.InputSystem.sendMouseEvent(InputSystem.java:392)
at org.terasology.input.InputSystem.processMouseInput(InputSystem.java:247)
at org.terasology.input.InputSystem.update(InputSystem.java:204)
at org.terasology.engine.modes.StateMainMenu.handleInput(StateMainMenu.java:134)
at org.terasology.engine.subsystem.lwjgl.LwjglInput.postUpdate(LwjglInput.java:65)
at org.terasology.engine.TerasologyEngine.mainLoop(TerasologyEngine.java:445)
at org.terasology.engine.TerasologyEngine.run(TerasologyEngine.java:246)
at org.terasology.engine.Terasology.main(Terasology.java:90)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:601)

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