java.lang.NullPointerException

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    • java.lang.NullPointerException at com.jcloisterzone.game.Game.undo(Game.java:186) at com.jcloisterzone.ui.ClientMessageListener.handleUndo(ClientMessageListener.java:518) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:497) at com.jcloisterzone.wsio.MessageDispatcher.dispatchOn(MessageDispatcher.java:36) at com.jcloisterzone.wsio.MessageDispatcher.dispatch(MessageDispatcher.java:20) at com.jcloisterzone.ui.ClientMessageListener.onWebsocketMessage(ClientMessageListener.java:143) at com.jcloisterzone.wsio.WebSocketConnection$WebSocketClientImpl.onMessage(WebSocketConnection.java:100) at org.java_websocket.client.WebSocketClient.onWebsocketMessage(WebSocketClient.java:248) at org.java_websocket.WebSocketImpl.decodeFrames(WebSocketImpl.java:375) at org.java_websocket.WebSocketImpl.decode(WebSocketImpl.java:158) at org.java_websocket.client.WebSocketClient.run(WebSocketClient.java:185) at java.lang.Thread.run(Thread.java:745)[Thread-2]
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