Failure in test execution

FAILED: bankManagerLoginTest java.lang.NullPointerException at com.w2a.base.TestBase.click(TestBase.java:142) at com.w2a.testcases.BankManagerLoginTest.bankManagerLoginTest(BankManagerLoginTest.java:20) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) at java.lang.reflect.Method.invoke(Unknown Source) at org.testng.internal.MethodInvocationHelper.invokeMethod(MethodInvocationHelper.java:85) at org.testng.internal.Invoker.invokeMethod(Invoker.java:663) at org.testng.internal.Invoker.invokeTestMethod(Invoker.java:849) at org.testng.internal.Invoker.invokeTestMethods(Invoker.java:1157) at org.testng.internal.TestMethodWorker.invokeTestMethods(TestMethodWorker.java:124) at org.testng.internal.TestMethodWorker.run(TestMethodWorker.java:108) at org.testng.TestRunner.privateRun(TestRunner.java:771) at org.testng.TestRunner.run(TestRunner.java:621) at org.testng.SuiteRunner.runTest(SuiteRunner.java:357) at org.testng.SuiteRunner.runSequentially(SuiteRunner.java:352) at org.testng.SuiteRunner.privateRun(SuiteRunner.java:310) at org.testng.SuiteRunner.run(SuiteRunner.java:259) at org.testng.SuiteRunnerWorker.runSuite(SuiteRunnerWorker.java:52) at org.testng.SuiteRunnerWorker.run(SuiteRunnerWorker.java:86) at org.testng.TestNG.runSuitesSequentially(TestNG.java:1200) at org.testng.TestNG.runSuitesLocally(TestNG.java:1125) at org.testng.TestNG.run(TestNG.java:1033) at org.testng.remote.RemoteTestNG.run(RemoteTestNG.java:111) at org.testng.remote.RemoteTestNG.initAndRun(RemoteTestNG.java:204) at org.testng.remote.RemoteTestNG.main(RemoteTestNG.java:175)