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java.lang.NullPointerException: 	at com.appium.manager.AppiumParallelTest.setAuthorName(AppiumParallelTest.java:259)	at com.appium.manager.AppiumParallelTest.startAppiumServerInParallel(AppiumParallelTest.java:219)	at com.appium.manager.AppiumParallelTest.startAppiumServerInParallel(AppiumParallelTest.java:228)	at com.test.site.UserBaseTest.startApp(UserBaseTest.java:24)	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:498)	at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:86)	at org.testng.internal.Invoker.invokeConfigurationMethod(Invoker.java:514)	at org.testng.internal.Invoker.invokeConfigurations(Invoker.java:215)	at org.testng.internal.Invoker.invokeMethod(Invoker.java:589)	at org.testng.internal.Invoker.invokeTestMethod(Invoker.java:820)	at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:1128)	at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:129)	at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:112)	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)	at java.lang.Thread.run(Thread.java:745)