Request operation failed. Response status = Internal Server Error

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<exception>
    <status>FAILURE</status>
    <url>http://localhost:8080/business-central/rest/query/task?processInstanceId=644</url>
    <message>PersistenceException thrown with message 'org.hibernate.exception.SQLGrammarException: could not extract ResultSet'</message>
    <stackTrace>org.kie.remote.services.rest.exception.KieRemoteRestOperationException: org.hibernate.exception.SQLGrammarException: could not extract ResultSet
 at org.kie.remote.services.rest.exception.KieRemoteRestOperationException.internalServerError(KieRemoteRestOperationException.java:151)
 at org.kie.remote.services.cdi.ProcessRequestBean.doTaskOperation(ProcessRequestBean.java:419)
 at org.kie.remote.services.cdi.ProcessRequestBean.doRestTaskOperation(ProcessRequestBean.java:426)
 at org.kie.remote.services.cdi.ProcessRequestBean$Proxy$_$$_WeldClientProxy.doRestTaskOperation(ProcessRequestBean$Proxy$_$$_WeldClientProxy.java)
 at org.kie.remote.services.rest.ResourceBase.doRestTaskOperationWithTaskId(ResourceBase.java:600)
 at org.kie.remote.services.rest.QueryResourceImpl.doTaskSummaryQuery(QueryResourceImpl.java:158)
 at org.kie.remote.services.rest.QueryResourceImpl.taskSummaryQuery(QueryResourceImpl.java:130)
 at org.kie.remote.services.rest.QueryResourceImpl$Proxy$_$$_WeldClientProxy.taskSummaryQuery(QueryResourceImpl$Proxy$_$$_WeldClientProxy.java)
 at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
 at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
 at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
 at java.lang.reflect.Method.invoke(Method.java:606)
 at org.jboss.resteasy.core.MethodInjectorImpl.invoke(MethodInjectorImpl.java:168)
 at org.jboss.resteasy.core.ResourceMethod.invokeOnTarget(ResourceMethod.java:269)
 at org.jboss.resteasy.core.ResourceMethod.invoke(ResourceMethod.java:227)
 at org.jboss.resteasy.core.ResourceMethod.invoke(ResourceMethod.java:216)
 at org.jboss.resteasy.core.SynchronousDispatcher.getResponse(SynchronousDispatcher.java:561)
 at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:543)
 at org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:128)
 at org.jboss.resteasy.plugins.server.servlet.ServletContainerDispatcher.service(ServletContainerDispatcher.java:208)
 at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:55)
 at org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:50)
 at javax.servlet.http.HttpServlet.service(HttpServlet.java:847)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:295)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214)
 at org.kie.remote.services.rest.jaxb.DynamicJaxbContextFilter.doFilter(DynamicJaxbContextFilter.java:63)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:246)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214)
 at org.uberfire.ext.security.server.BasicAuthSecurityFilter.doFilter(BasicAuthSecurityFilter.java:53)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:246)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214)
 at org.uberfire.ext.security.server.SecureHeadersFilter.doFilter(SecureHeadersFilter.java:53)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:246)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214)
 at org.uberfire.ext.security.server.SecurityIntegrationFilter.doFilter(SecurityIntegrationFilter.java:45)
 at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:246)
 at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:214)
 at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:231)
 at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:149)
 at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:420)
 at org.jboss.as.jpa.interceptor.WebNonTxEmCloserValve.invoke(WebNonTxEmCloserValve.java:50)
 at org.jboss.as.jpa.interceptor.WebNonTxEmCloserValve.invoke(WebNonTxEmCloserValve.java:50)
 at org.jboss.as.web.security.SecurityContextAssociationValve.invoke(SecurityContextAssociationValve.java:169)
 at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:150)
 at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:97)
 at org.apache.catalina.authenticator.SingleSignOn.invoke(SingleSignOn.java:400)
 at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:102)
 at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:344)
 at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:854)
 at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:653)
 at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:926)
 at java.lang.Thread.run(Thread.java:745)
Caused by: javax.persistence.PersistenceException: org.hibernate.exception.SQLGrammarException: could not extract ResultSet
 at org.hibernate.ejb.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1387)
 at org.hibernate.ejb.AbstractEntityManagerImpl.convert(AbstractEntityManagerImpl.java:1310)
 at org.hibernate.ejb.QueryImpl.getResultList(QueryImpl.java:277)
 at org.hibernate.ejb.criteria.CriteriaQueryCompiler$3.getResultList(CriteriaQueryCompiler.java:254)
 at org.jbpm.services.task.persistence.TaskQueryCriteriaUtil.createQueryAndCallApplyMetaCriteriaAndGetResult(TaskQueryCriteriaUtil.java:580)
 at org.jbpm.services.task.persistence.TaskQueryCriteriaUtil.doCriteriaQuery(TaskQueryCriteriaUtil.java:221)
 at org.jbpm.services.task.persistence.JPATaskPersistenceContext.doTaskSummaryCriteriaQuery(JPATaskPersistenceContext.java:489)
 at org.jbpm.services.task.impl.TaskQueryServiceImpl.query(TaskQueryServiceImpl.java:633)
 at org.jbpm.services.task.impl.TaskQueryServiceImpl.getTasksByVariousFields(TaskQueryServiceImpl.java:589)
 at org.jbpm.services.task.commands.GetTasksByVariousFieldsCommand.execute(GetTasksByVariousFieldsCommand.java:241)
 at org.jbpm.services.task.commands.GetTasksByVariousFieldsCommand.execute(GetTasksByVariousFieldsCommand.java:43)
 at org.jbpm.services.task.commands.TaskCommandExecutorImpl$SelfExecutionCommandService.execute(TaskCommandExecutorImpl.java:65)
 at org.drools.core.command.impl.AbstractInterceptor.executeNext(AbstractInterceptor.java:41)
 at org.jbpm.services.task.persistence.TaskTransactionInterceptor.execute(TaskTransactionInterceptor.java:69)
 at org.drools.core.command.impl.AbstractInterceptor.executeNext(AbstractInterceptor.java:41)
 at org.drools.persistence.jta.TransactionLockInterceptor.execute(TransactionLockInterceptor.java:73)
 at org.drools.core.command.impl.AbstractInterceptor.executeNext(AbstractInterceptor.java:41)
 at org.drools.persistence.jpa.OptimisticLockRetryInterceptor.execute(OptimisticLockRetryInterceptor.java:82)
 at org.jbpm.services.task.commands.TaskCommandExecutorImpl.execute(TaskCommandExecutorImpl.java:40)
 at org.jbpm.services.task.impl.command.CommandBasedTaskService.execute(CommandBasedTaskService.java:156)
 at org.jbpm.kie.services.impl.UserTaskServiceImpl.execute(UserTaskServiceImpl.java:923)
 at org.jbpm.services.cdi.impl.UserTaskServiceCDIImpl$Proxy$_$$_WeldClientProxy.execute(UserTaskServiceCDIImpl$Proxy$_$$_WeldClientProxy.java)
 at org.kie.remote.services.cdi.ProcessRequestBean.doTaskOperation(ProcessRequestBean.java:411)
 ... 50 more
Caused by: org.hibernate.exception.SQLGrammarException: could not extract ResultSet
 at org.hibernate.exception.internal.SQLStateConversionDelegate.convert(SQLStateConversionDelegate.java:123)
 at org.hibernate.exception.internal.StandardSQLExceptionConverter.convert(StandardSQLExceptionConverter.java:49)
 at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:124)
 at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:109)
 at org.hibernate.engine.jdbc.internal.ResultSetReturnImpl.extract(ResultSetReturnImpl.java:88)
 at org.hibernate.loader.Loader.getResultSet(Loader.java:2062)
 at org.hibernate.loader.Loader.executeQueryStatement(Loader.java:1859)
 at org.hibernate.loader.Loader.executeQueryStatement(Loader.java:1838)
 at org.hibernate.loader.Loader.doQuery(Loader.java:906)
 at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:348)
 at org.hibernate.loader.Loader.doList(Loader.java:2550)
 at org.hibernate.loader.Loader.doList(Loader.java:2536)
 at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2366)
 at org.hibernate.loader.Loader.list(Loader.java:2361)
 at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:495)
 at org.hibernate.hql.internal.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:357)
 at org.hibernate.engine.query.spi.HQLQueryPlan.performList(HQLQueryPlan.java:198)
 at org.hibernate.internal.SessionImpl.list(SessionImpl.java:1230)
 at org.hibernate.internal.QueryImpl.list(QueryImpl.java:101)
 at org.hibernate.ejb.QueryImpl.getResultList(QueryImpl.java:268)
 ... 70 more
Caused by: com.microsoft.sqlserver.jdbc.SQLServerException: Column 'Task.name' is invalid in the select list because it is not contained in either an aggregate function or the GROUP BY clause.
 at com.microsoft.sqlserver.jdbc.SQLServerException.makeFromDatabaseError(SQLServerException.java:216)
 at com.microsoft.sqlserver.jdbc.SQLServerStatement.getNextResult(SQLServerStatement.java:1515)
 at com.microsoft.sqlserver.jdbc.SQLServerPreparedStatement.doExecutePreparedStatement(SQLServerPreparedStatement.java:404)
 at com.microsoft.sqlserver.jdbc.SQLServerPreparedStatement$PrepStmtExecCmd.doExecute(SQLServerPreparedStatement.java:350)
 at com.microsoft.sqlserver.jdbc.TDSCommand.execute(IOBuffer.java:5696)
 at com.microsoft.sqlserver.jdbc.SQLServerConnection.executeCommand(SQLServerConnection.java:1715)
 at com.microsoft.sqlserver.jdbc.SQLServerStatement.executeCommand(SQLServerStatement.java:180)
 at com.microsoft.sqlserver.jdbc.SQLServerStatement.executeStatement(SQLServerStatement.java:155)
 at com.microsoft.sqlserver.jdbc.SQLServerPreparedStatement.executeQuery(SQLServerPreparedStatement.java:285)
 at org.jboss.jca.adapters.jdbc.WrappedPreparedStatement.executeQuery(WrappedPreparedStatement.java:462)
 at org.hibernate.engine.jdbc.internal.ResultSetReturnImpl.extract(ResultSetReturnImpl.java:79)
 ... 85 more
</stackTrace>
</exception>