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java.lang.NullPointerException: 	at org.codelibs.fess.app.web.admin.webconfig.AdminWebconfigAction.lambda$getWebConfig$3593(AdminWebconfigAction.java:300)	at org.dbflute.optional.BaseOptional.callbackMapping(BaseOptional.java:228)	at org.dbflute.optional.OptionalEntity.map(OptionalEntity.java:287)	at org.codelibs.fess.app.web.admin.webconfig.AdminWebconfigAction.getWebConfig(AdminWebconfigAction.java:293)	at org.codelibs.fess.app.web.admin.webconfig.AdminWebconfigAction.update(AdminWebconfigAction.java:229)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:498)	at org.lastaflute.web.ruts.GodHandableAction.invokeExecuteMethod(GodHandableAction.java:345)	at org.lastaflute.web.ruts.GodHandableAction.actuallyExecute(GodHandableAction.java:316)	at org.lastaflute.web.ruts.GodHandableAction.doExecute(GodHandableAction.java:156)	at org.lastaflute.web.ruts.GodHandableAction.lambda$transactionalExecute$148(GodHandableAction.java:147)	at org.lastaflute.db.jta.stage.JTATransactionStage.doPerform(JTATransactionStage.java:66)	at org.lastaflute.db.jta.stage.JTATransactionStage.lambda$requiresNew$92(JTATransactionStage.java:55)	at org.lastaflute.di.tx.adapter.JTATransactionManagerAdapter.requiresNew(JTATransactionManagerAdapter.java:60)	at org.lastaflute.db.jta.stage.JTATransactionStage.requiresNew(JTATransactionStage.java:54)	at org.lastaflute.db.jta.stage.JTATransactionStage.selectable(JTATransactionStage.java:93)	at org.lastaflute.web.ruts.GodHandableAction.transactionalExecute(GodHandableAction.java:146)	at org.lastaflute.web.ruts.GodHandableAction.godHandyExecute(GodHandableAction.java:127)	at org.lastaflute.web.ruts.GodHandableAction.execute(GodHandableAction.java:111)	at org.lastaflute.web.ruts.ActionRequestProcessor.performAction(ActionRequestProcessor.java:194)	at org.lastaflute.web.ruts.ActionRequestProcessor.fire(ActionRequestProcessor.java:130)	at org.lastaflute.web.ruts.ActionRequestProcessor.process(ActionRequestProcessor.java:101)	at org.lastaflute.web.servlet.filter.RequestRoutingFilter.processAction(RequestRoutingFilter.java:239)	at org.lastaflute.web.servlet.filter.RequestRoutingFilter.routingToAction(RequestRoutingFilter.java:191)	at org.lastaflute.web.servlet.filter.RequestRoutingFilter.lambda$createActionPathHandler$265(RequestRoutingFilter.java:164)	at org.lastaflute.web.path.ActionPathResolver.actuallyHandleActionPath(ActionPathResolver.java:269)	at org.lastaflute.web.path.ActionPathResolver.doHandleActionPath(ActionPathResolver.java:191)	at org.lastaflute.web.path.ActionPathResolver.handleActionPath(ActionPathResolver.java:111)	at org.lastaflute.web.servlet.filter.RequestRoutingFilter.doFilter(RequestRoutingFilter.java:104)	at org.lastaflute.web.servlet.filter.LastaToActionFilter.viaEmbeddedFilter(LastaToActionFilter.java:152)	at org.lastaflute.web.servlet.filter.LastaToActionFilter.viaInsideHookDeque(LastaToActionFilter.java:143)	at org.lastaflute.web.servlet.filter.LastaToActionFilter.viaInsideHook(LastaToActionFilter.java:127)	at org.lastaflute.web.servlet.filter.LastaToActionFilter.doFilter(LastaToActionFilter.java:119)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)	at org.lastaflute.web.servlet.filter.LastaShowbaseFilter.toNextChain(LastaShowbaseFilter.java:162)	at org.lastaflute.web.servlet.filter.LastaShowbaseFilter.lambda$viaEmbeddedFilter$272(LastaShowbaseFilter.java:141)	at org.lastaflute.web.servlet.filter.RequestLoggingFilter.actuallyFilter(RequestLoggingFilter.java:212)	at org.lastaflute.web.servlet.filter.RequestLoggingFilter.doFilter(RequestLoggingFilter.java:197)	at org.lastaflute.web.servlet.filter.LastaShowbaseFilter.viaEmbeddedFilter(LastaShowbaseFilter.java:139)	at org.lastaflute.web.servlet.filter.LastaShowbaseFilter.viaOutsideHookDeque(LastaShowbaseFilter.java:130)	at org.lastaflute.web.servlet.filter.LastaShowbaseFilter.viaOutsideHook(LastaShowbaseFilter.java:114)	at org.lastaflute.web.servlet.filter.LastaShowbaseFilter.doFilter(LastaShowbaseFilter.java:106)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)	at org.codelibs.fess.filter.WebApiFilter.doFilter(WebApiFilter.java:51)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)	at org.lastaflute.web.servlet.filter.LastaPrepareFilter.toNextFilter(LastaPrepareFilter.java:279)	at org.lastaflute.web.servlet.filter.LastaPrepareFilter.viaHotdeploy(LastaPrepareFilter.java:242)	at org.lastaflute.web.servlet.filter.LastaPrepareFilter.viaLastaDiContext(LastaPrepareFilter.java:229)	at org.lastaflute.web.servlet.filter.LastaPrepareFilter.doFilter(LastaPrepareFilter.java:202)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)	at org.codelibs.fess.filter.EncodingFilter.doFilter(EncodingFilter.java:119)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:192)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:165)	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:198)	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:108)	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:522)	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:140)	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:87)	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:349)	at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:1110)	at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66)	at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:785)	at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1425)	at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)	at java.lang.Thread.run(Thread.java:745)