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java.lang.NoClassDefFoundError: com.android.uiautomator.core.Configurator at io.appium.android.bootstrap.AndroidElement.<init>(AndroidElement.java:26) at io.appium.android.bootstrap.AndroidElementsHash.addElement(AndroidElementsHash.java:47) at io.appium.android.bootstrap.AndroidElementsHash.getElement(AndroidElementsHash.java:89) at io.appium.android.bootstrap.handler.Find.fetchElement(Find.java:150) at io.appium.android.bootstrap.handler.Find.execute(Find.java:90) at io.appium.android.bootstrap.AndroidCommandExecutor.execute(AndroidCommandExecutor.java:64) at io.appium.android.bootstrap.SocketServer.runCommand(SocketServer.java:168) at io.appium.android.bootstrap.SocketServer.handleClientData(SocketServer.java:89) at io.appium.android.bootstrap.SocketServer.listenForever(SocketServer.java:133) at io.appium.android.bootstrap.Bootstrap.testRunServer(Bootstrap.java:16) at java.lang.reflect.Method.invokeNative(Native Method) at com.android.uiautomator.testrunner.UiAutomatorTestRunner.start(UiAutomatorTestRunner.java:144) at com.android.uiautomator.testrunner.UiAutomatorTestRunner.run(UiAutomatorTestRunner.java:87) at com.android.commands.uiautomator.RunTestCommand.run(RunTestCommand.java:90) at com.android.commands.uiautomator.Launcher.main(Launcher.java:83) at com.android.internal.os.RuntimeInit.nativeFinishInit(Native Method) at com.android.internal.os.RuntimeInit.main(RuntimeInit.java:235) at dalvik.system.NativeStart.main(Native Method)