I am getting error when login to Pega with gmail using Open ID connect authentication . I checked the log and got below message:

1)Initiating OIDC flow  

2)Constructing authorization URL for OIDC provider  

3)Processing authorization code recieved from OIDC provider  

4)StateParam Validation is successful.

5)Fetching access token using authCode received  

then the below error:

java.lang.NoClassDefFoundError  java.lang.NoClassDefFoundError: org/apache/commons/logging/LogFactory      at org.apache.http.conn.ssl.DefaultHostnameVerifier.<init>(DefaultHostnameVerifier.java:82) ~[httpclient-4.5.6.jar:?]      at org.apache.http.conn.ssl.DefaultHostnameVerifier.<init>(DefaultHostnameVerifier.java:91) ~[httpclient-4.5.6.jar:?]      at com.pega.platform.integrationcore.client.http.internal.ComponentsHttpClient.applySSLSocketFactory(ComponentsHttpClient.java:873) ~[integration-core.jar:?]      at com.pega.pegarules.integration.engine.internal.client.oauth2.OAuth2ClientImpl.initializeRESTClient(OAuth2ClientImpl.java:722) ~[printegrint.jar:?]      at com.pega.pegarules.integration.engine.internal.client.oauth2.OAuth2ClientImpl.invokeTokenEndpoint(OAuth2ClientImpl.java:693) ~[printegrint.jar:?]      at com.pega.pegarules.integration.engine.internal.client.oauth2.OAuth2ClientImpl.getTokensFromEndpoint(OAuth2ClientImpl.java:640) ~[printegrint.jar:?]      at com.pega.pegarules.integration.engine.internal.client.oauth2.OAuth2ClientImpl.getTokensFromEndpoint(OAuth2ClientImpl.java:554) ~[printegrint.jar:?]      at com.pega.pegarules.integration.engine.internal.auth.oidc.OIDCClientHandler.processAuthcodeRes(OIDCClientHandler.java:130) ~[printegrint.jar:?]      at com.pega.pegarules.integration.engine.internal.auth.oidc.OIDCClientHandler.authenticate(OIDCClientHandler.java:76) ~[printegrint.jar:?]      at com.pega.pegarules.session.internal.mgmt.authentication.SchemePRAuth.authenticateOperator(SchemePRAuth.java:373) ~[prprivate-session.jar:?]      at com.pega.pegarules.session.internal.mgmt.authentication.Authentication.doAuthentication(Authentication.java:512) ~[prprivate-session.jar:?]      at com.pega.pegarules.session.internal.engineinterface.service.HTTPAuthenticationHandler.performAuthentication(HTTPAuthenticationHandler.java:251) ~[prprivate-session.jar:?]      at com.pega.pegarules.session.internal.engineinterface.service.HTTPAuthenticationHandler.doHttpReqAuthentication(HTTPAuthenticationHandler.java:94) ~[prprivate-session.jar:?]      at com.pega.pegarules.session.internal.engineinterface.service.HttpAPI.handleAuthentication(HttpAPI.java:2798) ~[prprivate-session.jar:?]      at com.pega.pegarules.session.external.engineinterface.service.EngineAPI.activityExecutionProlog(EngineAPI.java:597) ~[prenginext.jar:?]      at com.pega.pegarules.session.external.engineinterface.service.EngineAPI.processRequestInner(EngineAPI.java:436) ~[prenginext.jar:?]      at sun.reflect.GeneratedMethodAccessor206.invoke(Unknown Source) ~[?:?]      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_121]      at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_121]      at com.pega.pegarules.session.internal.PRSessionProviderImpl.performTargetActionWithLock(PRSessionProviderImpl.java:1393) ~[prprivate-session.jar:?]      at com.pega.pegarules.session.internal.PRSessionProviderImpl.doWithRequestorLocked(PRSessionProviderImpl.java:1125) ~[prprivate-session.jar:?]      at com.pega.pegarules.session.internal.PRSessionProviderImpl.doWithRequestorLocked(PRSessionProviderImpl.java:979) ~[prprivate-session.jar:?]      at com.pega.pegarules.session.external.engineinterface.service.EngineAPI.processRequest(EngineAPI.java:361) ~[prenginext.jar:?]      at com.pega.pegarules.session.internal.engineinterface.service.HttpAPI.invoke(HttpAPI.java:916) ~[prprivate-session.jar:?]      at com.pega.pegarules.session.internal.engineinterface.etier.impl.EngineImpl._invokeEngine_privact(EngineImpl.java:331) ~[prprivate-session.jar:?]      at com.pega.pegarules.session.internal.engineinterface.etier.impl.EngineImpl.invokeEngine(EngineImpl.java:274) ~[prprivate-session.jar:?]      at com.pega.pegarules.session.internal.engineinterface.etier.impl.EngineImpl.invokeEngine(EngineImpl.java:251) ~[prprivate-session.jar:?]      at com.pega.pegarules.priv.context.JNDIEnvironment.invokeEngineInner(JNDIEnvironment.java:275) ~[prpublic.jar:?]      at com.pega.pegarules.priv.context.JNDIEnvironment.invokeEngine(JNDIEnvironment.java:220) ~[prpublic.jar:?]      at com.pega.pegarules.web.impl.WebStandardImpl.makeEtierRequest(WebStandardImpl.java:743) ~[prwebj2ee.jar:?]      at com.pega.pegarules.web.impl.WebStandardImpl.doPost(WebStandardImpl.java:413) ~[prwebj2ee.jar:?]      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[?:1.8.0_121]      at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[?:1.8.0_121]      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[?:1.8.0_121]      at java.lang.reflect.Method.invoke(Method.java:498) ~[?:1.8.0_121]      at com.pega.pegarules.internal.bootstrap.PRBootstrap.invokeMethod(PRBootstrap.java:380) ~[prbootstrap-8.3.0-225.jar:8.3.0-225]      at com.pega.pegarules.internal.bootstrap.PRBootstrap.invokeMethodPropagatingThrowable(PRBootstrap.java:422) ~[prbootstrap-8.3.0-225.jar:8.3.0-225]      at com.pega.pegarules.boot.internal.extbridge.AppServerBridgeToPega.invokeMethodPropagatingThrowable(AppServerBridgeToPega.java:224) ~[prbootstrap-api-8.3.0-225.jar:8.3.0-225]      at com.pega.pegarules.boot.internal.extbridge.AppServerBridgeToPega.invokeMethod(AppServerBridgeToPega.java:273) ~[prbootstrap-api-8.3.0-225.jar:8.3.0-225]      at com.pega.pegarules.internal.web.servlet.WebStandardBoot.doPost(WebStandardBoot.java:141) ~[prbootstrap-api-8.3.0-225.jar:8.3.0-225]      at com.pega.pegarules.internal.web.servlet.WebStandardBoot.doGet(WebStandardBoot.java:102) ~[prbootstrap-api-8.3.0-225.jar:8.3.0-225]      at javax.servlet.http.HttpServlet.service(HttpServlet.java:635) ~[servlet-api.jar:?]      at com.pega.pegarules.internal.web.servlet.WebStandardBoot.service(WebStandardBoot.java:167) ~[prbootstrap-api-8.3.0-225.jar:8.3.0-225]      at javax.servlet.http.HttpServlet.service(HttpServlet.java:742) ~[servlet-api.jar:?]      at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) ~[catalina.jar:8.5.14]      at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[catalina.jar:8.5.14]      at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52) ~[tomcat-websocket.jar:8.5.14]      at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[catalina.jar:8.5.14]      at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[catalina.jar:8.5.14]      at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198) ~[catalina.jar:8.5.14]      at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) ~[catalina.jar:8.5.14]      at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:478) ~[catalina.jar:8.5.14]      at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140) ~[catalina.jar:8.5.14]      at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:80) ~[catalina.jar:8.5.14]      at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:624) ~[catalina.jar:8.5.14]      at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87) ~[catalina.jar:8.5.14]      at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:342) ~[catalina.jar:8.5.14]      at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:799) ~[tomcat-coyote.jar:8.5.14]      at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) ~[tomcat-coyote.jar:8.5.14]      at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:861) ~[tomcat-coyote.jar:8.5.14]      at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1455) ~[tomcat-coyote.jar:8.5.14]      at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) ~[tomcat-coyote.jar:8.5.14]      at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) [?:1.8.0_121]      at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) [?:1.8.0_121]      at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) ~[tomcat-util.jar:8.5.14]      at java.lang.Thread.run(Thread.java:745) [?:1.8.0_121] 

Why getting NoClassDefFoundError ? 

Thanks in advance.