websocket - Error in NonGUIDriver java.lang.IllegalArgumentException in JMeter -

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i getting following error, after trying run jmeter on the console. working fine in gui mode.

error in nonguidriver java.lang.illegalargumentexception: problem loading xml from:'/users/omaroof/desktop/mywork/apache-jmeter-3.0/bin/sockettestingcoapp.jmx', missing class com.thoughtworks.xstream.converters.conversionexception: jmeter.plugins.functional.samplers.websocket.websocketsampler : jmeter.plugins.functional.samplers.websocket.websocketsampler --


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