Agent going down frequently with an exception.

Exception at 20200629T160455.453 GMT: java.lang.NullPointerException at com.pegarules.generated.activity.ra_action_updateaccountnodetails_efb802f10e059d468cd3e55999853d2a.step4_10_circum0(ra_action_updateaccountnodetails_efb802f10e059d468cd3e55999853d2a.java:1678) at com.pegarules.generated.activity.ra_action_updateaccountnodetails_efb802f10e059d468cd3e55999853d2a.step4_0_circum0_AEXP_FW_Case_Lite_Data_Attachment(ra_action_updateaccountnodetails_efb802f10e059d468cd3e55999853d2a.java:699) at com.pegarules.generated.activity.ra_action_updateaccountnodetails_efb802f10e059d468cd3e55999853d2a.perform(ra_action_updateaccountnodetails_efb802f10e059d468cd3e55999853d2a.java:143) at com.pega.pegarules.session.internal.mgmt.Executable.doActivity(Executable.java:3375) at com.pega.pegarules.session.internal.mgmt.Executable.invokeActivity(Executable.java:10450) at com.pegarules.generated.activity.ra_action_sendattachmentstoinfoimage_f5e70c687975c0b32d806f7636bfeea1.step2_circum0(ra_action_sendattachmentstoinfoimage_f5e70c687975c0b32d806f7636bfeea1.java:280) at com.pegarules.generated.activity.ra_action_sendattachmentstoinfoimage_f5e70c687975c0b32d806f7636bfeea1.perform(ra_action_sendattachmentstoinfoimage_f5e70c687975c0b32d806f7636bfeea1.java:86) at com.pega.pegarules.session.internal.mgmt.Executable.doActivity(Executable.java:3375) at com.pega.pegarules.session.internal.async.agent.QueueProcessor.runActivity(QueueProcessor.java:719) at com.pega.pegarules.session.internal.async.agent.QueueProcessor.execute(QueueProcessor.java:600) at com.pega.pegarules.session.internal.async.BatchRequestorTask.run(BatchRequestorTask.java:913) at com.pega.pegarules.session.internal.PRSessionProviderImpl.performTargetActionWithLock(PRSessionProviderImpl.java:1177) at com.pega.pegarules.session.internal.PRSessionProviderImpl.doWithRequestorLocked(PRSessionProviderImpl.java:926) at com.pega.pegarules.session.internal.PRSessionProviderImpl.doWithRequestorLocked(PRSessionProviderImpl.java:825) at com.pega.pegarules.session.internal.async.BatchRequestorTask.run(BatchRequestorTask.java:646) at com.pega.pegarules.session.internal.async.Agent.queueBatchActivityForAgent(Agent.java:1505) at com.pega.pegarules.session.internal.async.Agent.queueBatchActivityForAgent(Agent.java:1294) at com.pega.pegarules.session.internal.async.AgentQueue.run(AgentQueue.java:769) at com.pega.pegarules.session.internal.async.Agent.runAgentTask(Agent.java:937) at com.pega.pegarules.session.internal.engineinterface.etier.impl.AsyncServant.processAsyncTask(AsyncServant.java:220) at com.pega.pegarules.session.internal.engineinterface.etier.impl.AsyncServant.invoke(AsyncServant.java:166) at com.pega.pegarules.session.internal.engineinterface.etier.impl.EngineImpl._invokeEngine_privact(EngineImpl.java:315) at com.pega.pegarules.session.internal.engineinterface.etier.impl.EngineImpl.invokeEngine(EngineImpl.java:263) at com.pega.pegarules.session.internal.engineinterface.etier.ejb.EngineBean.invokeEngine(EngineBean.java:225) at sun.reflect.GeneratedMethodAccessor124.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:56) at java.lang.reflect.Method.invoke(Method.java:620) at com.pega.pegarules.internal.bootstrap.PRBootstrap.invokeMethod(PRBootstrap.java:338) at com.pega.pegarules.internal.bootstrap.PRBootstrap.invokeMethodPropagatingThrowable(PRBootstrap.java:379) at com.pega.pegarules.boot.internal.extbridge.AppServerBridgeToPega.invokeMethodPropagatingThrowable(AppServerBridgeToPega.java:216) at com.pega.pegarules.boot.internal.extbridge.AppServerBridgeToPega.invokeMethodPropagatingException(AppServerBridgeToPega.java:238) at com.pega.pegarules.internal.etier.ejb.EngineBeanBoot.invokeEngine(EngineBeanBoot.java:168) at com.pega.pegarules.internal.etier.interfaces.EJSLocalStatelessEngineBMT_f2439d86.invokeEngine(Unknown Source) at com.pega.pegarules.session.internal.engineinterface.etier.mdb.PRAsync.processRequest(PRAsync.java:155) at com.pega.pegarules.session.internal.engineinterface.etier.asynchbeans.AsyncTask.run(AsyncTask.java:64) at com.pega.pegarules.session.internal.engineinterface.etier.asynchbeans.RunnableWrapper.run(RunnableWrapper.java:71) at com.ibm.ws.asynchbeans.J2EEContext$RunProxy.run(J2EEContext.java:271) at java.security.AccessController.doPrivileged(AccessController.java:360) at com.ibm.ws.asynchbeans.J2EEContext.run(J2EEContext.java:797) at com.ibm.ws.asynchbeans.WorkWithExecutionContextImpl.go(WorkWithExecutionContextImpl.java:222) at com.ibm.ws.asynchbeans.ABWorkItemImpl.run(ABWorkItemImpl.java:206) at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1881)