Hi,

Getting the below error messages while logging into the application. And attached the screenshot for reference. 

Can anyone please advise.

Thu Jun 25 05:16:18 EDT 2020. Pega 8.1 PRPC-8.1.7-904

An error has occurred processing this request. Please contact your system administrator.

Details:java.lang.RuntimeException : Problem during method invocation (doPost)

java.lang.RuntimeException: Problem during method invocation (doPost)
	at com.pega.pegarules.boot.internal.extbridge.AppServerBridgeToPega.invokeMethod(AppServerBridgeToPega.java:279)
	at com.pega.pegarules.internal.web.servlet.WebStandardBoot.doPost(WebStandardBoot.java:129)
	at com.pega.pegarules.internal.web.servlet.WebStandardBoot.doGet(WebStandardBoot.java:100)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:575)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:668)
	at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1233)
	at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:782)
	at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:481)
	at com.ibm.ws.webcontainer.servlet.ServletWrapperImpl.handleRequest(ServletWrapperImpl.java:178)
	at com.ibm.ws.webcontainer.filter.WebAppFilterManager.invokeFilters(WebAppFilterManager.java:1114)
	at com.ibm.ws.webcontainer.servlet.CacheServletWrapper.handleRequest(CacheServletWrapper.java:87)
	at com.ibm.ws.webcontainer.WebContainer.handleRequest(WebContainer.java:949)
	at com.ibm.ws.webcontainer.WSWebContainer.handleRequest(WSWebContainer.java:1817)
	at com.ibm.ws.webcontainer.channel.WCChannelLink.ready(WCChannelLink.java:213)
	at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleDiscrimination(HttpInboundLink.java:463)
	at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.handleNewRequest(HttpInboundLink.java:530)
	at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.processRequest(HttpInboundLink.java:316)
	at com.ibm.ws.http.channel.inbound.impl.HttpInboundLink.ready(HttpInboundLink.java:287)
	at com.ibm.ws.tcp.channel.impl.NewConnectionInitialReadCallback.sendToDiscriminators(NewConnectionInitialReadCallback.java:214)
	at com.ibm.ws.tcp.channel.impl.NewConnectionInitialReadCallback.complete(NewConnectionInitialReadCallback.java:113)
	at com.ibm.ws.tcp.channel.impl.AioReadCompletionListener.futureCompleted(AioReadCompletionListener.java:175)
	at com.ibm.io.async.AbstractAsyncFuture.invokeCallback(AbstractAsyncFuture.java:217)
	at com.ibm.io.async.AsyncChannelFuture.fireCompletionActions(AsyncChannelFuture.java:161)
	at com.ibm.io.async.AsyncFuture.completed(AsyncFuture.java:138)
	at com.ibm.io.async.ResultHandler.complete(ResultHandler.java:204)
	at com.ibm.io.async.ResultHandler.runEventProcessingLoop(ResultHandler.java:775)
	at com.ibm.io.async.ResultHandler$2.run(ResultHandler.java:905)
	at com.ibm.ws.util.ThreadPool$Worker.run(ThreadPool.java:1892)
Caused by: java.lang.NoClassDefFoundError: com.pega.pegarules.session.internal.simpleurl.SimpleURLServiceFactory (initialization failure)
	at java.lang.J9VMInternals.initializationAlreadyFailed(J9VMInternals.java:98)
	at com.pega.pegarules.session.internal.PRSessionProviderImpl.getSimpleURLService(PRSessionProviderImpl.java:2601)
	at com.pega.pegarules.web.impl.WebStandardImpl.isHttpSimpleURL(WebStandardImpl.java:1568)
	at com.pega.pegarules.web.impl.WebStandardImpl.runStaticContentRequest(WebStandardImpl.java:1549)
	at com.pega.pegarules.web.impl.WebStandardImpl.doPost(WebStandardImpl.java:371)
	at sun.reflect.GeneratedMethodAccessor74.invoke(Unknown Source)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:55)
	at java.lang.reflect.Method.invoke(Method.java:508)
	at com.pega.pegarules.internal.bootstrap.PRBootstrap.invokeMethod(PRBootstrap.java:382)
	at com.pega.pegarules.internal.bootstrap.PRBootstrap.invokeMethodPropagatingThrowable(PRBootstrap.java:423)
	at com.pega.pegarules.boot.internal.extbridge.AppServerBridgeToPega.invokeMethodPropagatingThrowable(AppServerBridgeToPega.java:224)
	at com.pega.pegarules.boot.internal.extbridge.AppServerBridgeToPega.invokeMethod(AppServerBridgeToPega.java:273)
	... 27 more
Caused by: com.pega.pegarules.pub.PRRuntimeException: Error determining the mode of PRPC install from database.
	at com.pega.pegarules.data.internal.PRDataProviderImpl.isMultiTenantEnvironment(PRDataProviderImpl.java:1430)
	at com.pega.pegarules.session.internal.simpleurl.SimpleURLServiceSettings.isEnabled(SimpleURLServiceSettings.java:31)
	at com.pega.pegarules.session.internal.simpleurl.SimpleURLServiceFactory.<init>(SimpleURLServiceFactory.java:30)
	at com.pega.pegarules.session.internal.simpleurl.SimpleURLServiceFactory.<clinit>(SimpleURLServiceFactory.java:23)
	at com.pega.pegarules.session.internal.PRSessionProviderImpl.getSimpleURLService(PRSessionProviderImpl.java:2601)
	at com.pega.pegarules.web.impl.WebStandardImpl.isHttpSimpleURL(WebStandardImpl.java:1568)
	at com.pega.pegarules.web.impl.WebStandardImpl.runStaticContentRequest(WebStandardImpl.java:1549)
	at com.pega.pegarules.web.impl.WebStandardImpl.doPost(WebStandardImpl.java:371)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:90)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:55)
	at java.lang.reflect.Method.invoke(Method.java:508)
	at com.pega.pegarules.internal.bootstrap.PRBootstrap.invokeMethod(PRBootstrap.java:382)
	at com.pega.pegarules.internal.bootstrap.PRBootstrap.invokeMethodPropagatingThrowable(PRBootstrap.java:423)
	at com.pega.pegarules.boot.internal.extbridge.AppServerBridgeToPega.invokeMethodPropagatingThrowable(AppServerBridgeToPega.java:224)
	at com.pega.pegarules.boot.internal.extbridge.AppServerBridgeToPega.invokeMethod(AppServerBridgeToPega.java:273)
	at com.pega.pegarules.internal.web.servlet.WebStandardBoot.doPost(WebStandardBoot.java:129)
	at com.pega.pegarules.internal.web.servlet.WebStandardBoot.doGet(WebStandardBoot.java:100)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:575)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:668)
	at com.ibm.ws.webcontainer.servlet.ServletWrapper.service(ServletWrapper.java:1233)
	at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:782)
	at com.ibm.ws.webcontainer.servlet.ServletWrapper.handleRequest(ServletWrapper.java:481)
	at com.ibm.ws.webcontainer.servlet.ServletWrapperImpl.handleRequest(ServletWrapperImpl.java:178)
	at com.ibm.ws.webcontainer.filter.WebAppFilterManager.invokeFilters(WebAppFilterManager.java:1114)
	at com.ibm.ws.webcontainer.webapp.WebApp.handleRequest(WebApp.java:4047)
	at com.ibm.ws.webcontainer.webapp.WebGroup.handleRequest(WebGroup.java:304)
	at com.ibm.ws.webcontainer.WebContainer.handleRequest(WebContainer.java:1016)
	... 16 more
Caused by: com.pega.pegarules.pub.database.BadDatabaseDefinitionException: Database-BadDBDef-Missing	PegaRULES
From: (unknown) 
	at com.pega.pegarules.data.internal.store.DatabaseConfigurationMap.getDBConfig(DatabaseConfigurationMap.java:209)
	at com.pega.pegarules.data.internal.store.rdbms.JdbcConnectionManagerImpl.getDBConfig(JdbcConnectionManagerImpl.java:3020)
	at com.pega.pegarules.data.internal.store.rdbms.JdbcConnectionManagerImpl.getDataStoreConnection(JdbcConnectionManagerImpl.java:1298)
	at com.pega.pegarules.data.internal.store.rdbms.JdbcConnectionManagerImpl.getDataStoreConnection(JdbcConnectionManagerImpl.java:1211)
	at com.pega.pegarules.data.internal.store.rdbms.JdbcConnectionManagerImpl.getConnection(JdbcConnectionManagerImpl.java:1173)
	at com.pega.pegarules.data.internal.store.rdbms.JdbcConnectionManagerImpl.getConnection(JdbcConnectionManagerImpl.java:372)
	at com.pega.pegarules.data.internal.PRDataProviderImpl.isMultiTenantEnvironment(PRDataProviderImpl.java:1420)
	... 43 more