Hi Team,

On checking logs found the below error:

ERROR www.ex.com|xx.xx.xx.xx  Proprietary information hidden - Exception while updating Clipboard Models : java.lang.NullPointerException     at com.pega.pegarules.session.internal.mgmt.autostreams.HarnessRuntime.updateClipboardModels(HarnessRuntime.java:290)     at com.pegarules.generated.html_harness.ra_stream_harnessfail_708339cd6b9cf47ca0c339edd41b5db0.updateClipboardModel_1(ra_stream_harnessfail_708339cd6b9cf47ca0c339edd41b5db0.java:4273)     at com.pegarules.generated.html_harness.ra_stream_harnessfail_708339cd6b9cf47ca0c339edd41b5db0.buildHarnessMarkup_1(ra_stream_harnessfail_708339cd6b9cf47ca0c339edd41b5db0.java:4533)     at com.pegarules.generated.html_harness.ra_stream_harnessfail_708339cd6b9cf47ca0c339edd41b5db0.performStream_19(ra_stream_harnessfail_708339cd6b9cf47ca0c339edd41b5db0.java:4744)     at com.pegarules.generated.html_harness.ra_stream_harnessfail_708339cd6b9cf47ca0c339edd41b5db0.execute(ra_stream_harnessfail_708339cd6b9cf47ca0c339edd41b5db0.java:161)     at com.pega.pegarules.session.internal.mgmt.Executable.getStream(Executable.java:4302)     at com.pegarules.generated.activity.ra_action_displayharnesswithclass_1fb5955556fb0089cf9f7357cb53f8d5.step4_circum0(ra_action_displayharnesswithclass_1fb5955556fb0089cf9f7357cb53f8d5.java:588)     at com.pegarules.generated.activity.ra_action_displayharnesswithclass_1fb5955556fb0089cf9f7357cb53f8d5.perform(ra_action_displayharnesswithclass_1fb5955556fb0089cf9f7357cb53f8d5.java:127)     at com.pega.pegarules.session.internal.mgmt.Executable.doActivity(Executable.java:2824)     at com.pegarules.generated.activity.ra_action_douiaction_7a9a4a67a3992e8cef45fe245454b36c.step27_circum0(ra_action_douiaction_7a9a4a67a3992e8cef45fe245454b36c.java:2765)     at com.pegarules.generated.activity.ra_action_douiaction_7a9a4a67a3992e8cef45fe245454b36c.perform(ra_action_douiaction_7a9a4a67a3992e8cef45fe245454b36c.java:518)     at com.pega.pegarules.session.internal.mgmt.Executable.doActivity(Executable.java:2824)     at com.pega.pegarules.session.internal.mgmt.base.ThreadRunner.runActivitiesAlt(ThreadRunner.java:653)     at com.pega.pegarules.session.internal.mgmt.PRThreadImpl.runActivitiesAlt(PRThreadImpl.java:520)     at com.pega.pegarules.session.internal.engineinterface.service.HttpAPI.runActivities(HttpAPI.java:4147)     at com.pega.pegarules.session.external.engineinterface.service.EngineAPI.processRequestInner(EngineAPI.java:445)     at jdk.internal.reflect.GeneratedMethodAccessor76.invoke(Unknown Source)     at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)     at java.base/java.lang.reflect.Method.invoke(Method.java:566)     at com.pega.pegarules.session.internal.PRSessionProviderImpl.performTargetActionWithLock(PRSessionProviderImpl.java:1408)     at com.pega.pegarules.session.internal.PRSessionProviderImpl.doWithRequestorLocked(PRSessionProviderImpl.java:1140)     at com.pega.pegarules.session.internal.PRSessionProviderImpl.doWithRequestorLocked(PRSessionProviderImpl.java:994)     at com.pega.pegarules.session.external.engineinterface.service.EngineAPI.processRequest(EngineAPI.java:368)     at com.pega.pegarules.session.internal.engineinterface.service.HttpAPI.invoke(HttpAPI.java:923)     at com.pega.pegarules.session.internal.engineinterface.etier.impl.EngineImpl._invokeEngine_privact(EngineImpl.java:338)     at com.pega.pegarules.session.internal.engineinterface.etier.impl.EngineImpl.invokeEngine(EngineImpl.java:282)     at com.pega.pegarules.session.internal.engineinterface.etier.impl.EngineImpl.invokeEngine(EngineImpl.java:259)     at com.pega.pegarules.priv.context.JNDIEnvironment.invokeEngineInner(JNDIEnvironment.java:281)     at com.pega.pegarules.priv.context.JNDIEnvironment.invokeEngine(JNDIEnvironment.java:226)     at com.pega.pegarules.web.impl.WebStandardImpl.makeEtierRequest(WebStandardImpl.java:766)     at com.pega.pegarules.web.impl.WebStandardImpl.doPost(WebStandardImpl.java:421)     at jdk.internal.reflect.GeneratedMethodAccessor81.invoke(Unknown Source)     at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)     at java.base/java.lang.reflect.Method.invoke(Method.java:566)     at com.pega.pegarules.internal.bootstrap.PRBootstrap.invokeMethod(PRBootstrap.java:385)     at com.pega.pegarules.internal.bootstrap.PRBootstrap.invokeMethodPropagatingThrowable(PRBootstrap.java:427)     at com.pega.pegarules.boot.internal.extbridge.AppServerBridgeToPega.invokeMethodPropagatingThrowable(AppServerBridgeToPega.java:225)     at com.pega.pegarules.boot.internal.extbridge.AppServerBridgeToPega.invokeMethod(AppServerBridgeToPega.java:274)     at com.pega.pegarules.internal.web.servlet.WebStandardBoot.doPost(WebStandardBoot.java:146)     at com.pega.pegarules.internal.web.servlet.WebStandardBoot.doGet(WebStandardBoot.java:107)     at javax.servlet.http.HttpServlet.service(HttpServlet.java:626)     at com.pega.pegarules.internal.web.servlet.WebStandardBoot.service(WebStandardBoot.java:172)     at javax.servlet.http.HttpServlet.service(HttpServlet.java:733)     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:227)     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)     at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53)     at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:189)     at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:162)     at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202)

Can anyone help me on this why this error occurs in logs and how to resolve this?

Thanks