[solved] bug:

java.lang.IllegalArgumentException: No enum constant
org.openqa.selenium.Platform.Windows 8.1


java.lang.IllegalArgumentException: No enum constant
org.openqa.selenium.Platform.Windows 8.1
	at java.lang.Enum.valueOf(Enum.java:236)
	at org.openqa.selenium.Platform.valueOf(Platform.java:30)
	at
com.kagrana.base.xRemoteWebDriver.getInstance(xRemoteWebDriver.java:51)
	at com.kagrana.base.BaseActions.beforeTest(BaseActions.java:53)
	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:606)
	at
org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:84)
	at
org.testng.internal.Invoker.invokeConfigurationMethod(Invoker.java:564)
	at org.testng.internal.Invoker.invokeConfigurations(Invoker.java:213)
	at org.testng.internal.Invoker.invokeMethod(Invoker.java:653)
	at org.testng.internal.Invoker.invokeTestMethod(Invoker.java:901)
	at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:1231)
	at
org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:127)
	at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:111)
	at org.testng.TestRunner.privateRun(TestRunner.java:767)
	at org.testng.TestRunner.run(TestRunner.java:617)
	at org.testng.SuiteRunner.runTest(SuiteRunner.java:334)
	at org.testng.SuiteRunner.access$000(SuiteRunner.java:37)
	at org.testng.SuiteRunner$SuiteWorker.run(SuiteRunner.java:368)
	at org.testng.internal.thread.ThreadUtil$2.call(ThreadUtil.java:64)
	at java.util.concurrent.FutureTask.run(FutureTask.java:262)
	at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at java.lang.Thread.run(Thread.java:744)