Please Help!

I installed Pentaho Server version 7, when I start start-pentaho.bat, the following error is displayed:


2017-09-18 20:05:38,379 ERROR [org.pentaho.platform.util.logging.Logger] misc-org.pentaho.platform.engine.core.system.PentahoSystem: org.pentaho.platform.api.engine.PentahoSystemException: PentahoSystem.ERROR_0014 - Error mientras se intentaba ejecutar la secuencia de arranque por org.pentaho.platform.engine.services.connection.datasource.dbcp.DynamicallyPooledDatasourceSystemListener
org.pentaho.platform.api.engine.PentahoSystemException: org.pentaho.platform.api.engine.PentahoSystemException: PentahoSystem.ERROR_0014 - Error mientras se intentaba ejecutar la secuencia de arranque por org.pentaho.platform.engine.services.connection.datasource.dbcp.DynamicallyPooledDatasourceSystemListener
at org.pentaho.platform.engine.core.system.PentahoSystem.notifySystemListenersOfStartup(PentahoSystem.java:370)
at org.pentaho.platform.engine.core.system.PentahoSystem.init(PentahoSystem.java:332)
at org.pentaho.platform.engine.core.system.PentahoSystem.init(PentahoSystem.java:228)
at org.pentaho.platform.web.http.context.SolutionContextListener.contextInitialized(SolutionContextListener.java:162)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4853)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5314)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:145)
at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:753)
at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:729)
at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:717)
at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1092)
at org.apache.catalina.startup.HostConfig$DeployDirectory.run(HostConfig.java:1834)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:748)
Caused by: org.pentaho.platform.api.engine.PentahoSystemException: PentahoSystem.ERROR_0014 - Error mientras se intentaba ejecutar la secuencia de arranque por org.pentaho.platform.engine.services.connection.datasource.dbcp.DynamicallyPooledDatasourceSystemListener
at org.pentaho.platform.engine.core.system.PentahoSystem$2.call(PentahoSystem.java:452)
at org.pentaho.platform.engine.core.system.PentahoSystem$2.call(PentahoSystem.java:434)
at org.pentaho.platform.engine.core.system.PentahoSystem.runAsSystem(PentahoSystem.java:413)
at org.pentaho.platform.engine.core.system.PentahoSystem.notifySystemListenersOfStartup(PentahoSystem.java:434)
at org.pentaho.platform.engine.core.system.PentahoSystem.access$000(PentahoSystem.java:84)
at org.pentaho.platform.engine.core.system.PentahoSystem$1.call(PentahoSystem.java:365)
at org.pentaho.platform.engine.core.system.PentahoSystem$1.call(PentahoSystem.java:362)
at org.pentaho.platform.engine.core.system.PentahoSystem.runAsSystem(PentahoSystem.java:413)
at org.pentaho.platform.engine.core.system.PentahoSystem.notifySystemListenersOfStartup(PentahoSystem.java:362)
... 16 more
Caused by: java.lang.NullPointerException
at org.pentaho.platform.repository.JcrBackedDatasourceMgmtService.init(JcrBackedDatasourceMgmtService.java:67)
at org.pentaho.platform.engine.core.system.objfac.AbstractSpringPentahoObjectFactory.retreiveObject(AbstractSpringPentahoObjectFactory.java:266)
at org.pentaho.platform.engine.core.system.objfac.AbstractSpringPentahoObjectFactory.get(AbstractSpringPentahoObjectFactory.java:82)
at org.pentaho.platform.engine.core.system.objfac.AggregateObjectFactory.get(AggregateObjectFactory.java:273)
at org.pentaho.platform.engine.core.system.objfac.AggregateObjectFactory.get(AggregateObjectFactory.java:137)
at org.pentaho.platform.engine.services.connection.datasource.dbcp.NonPooledDatasourceSystemListener.getListOfDatabaseConnections(NonPooledDatasourceSystemListener.java:137)
at org.pentaho.platform.engine.services.connection.datasource.dbcp.NonPooledDatasourceSystemListener.startup(NonPooledDatasourceSystemListener.java:53)
at org.pentaho.platform.engine.core.system.PentahoSystem$2.call(PentahoSystem.java:443)
... 24 more
2017-09-18 20:05:38,379 ERROR [org.pentaho.platform.util.logging.Logger] Error end:
2017-09-18 20:05:38,379 INFO [org.pentaho.platform.engine.core.system.status.PeriodicStatusLogger] Warning, one or more errors occurred during the initialization process.
2017-09-18 20:05:48,634 ERROR [org.pentaho.platform.plugin.services.security.userrole.CompositeUserRoleListService] User/Role List could not be obtained.
java.lang.IllegalStateException: Target of Bean was never resolved: org.springframework.security.core.userdetails.UserDetailsService
at org.pentaho.platform.engine.core.system.objfac.spring.BeanBuilder$1.invoke(BeanBuilder.java:157)



And it does not boot, I attach the error log, my repository is Postgresql 9.6, help please. Also how can I access videos and installation aids?