Buenas tardes,
en mi instalación de alfresco (5.2.0) tengo un problema con todo lo relacionado con la gestión, creación y busqueda de sitios.
Cuando accedo a Herramientas de admisnitraciones -> Gestión de sitios me aparece el siguiente mensaje y no aparecen los sitios:

Como admisnitración, en el Home dentro del Dashlet Mis sitios, le doy a crear un nuevo sitio, me aparece el mismo aviso al cargar el formulario para crear un sitio y conforme voy escribiendo el nombre del sitio me va apareciendo un mensaje parecido. Entodos, hace referencia a No enum constant org.alfresco.service.cmr.site.SiteVisibility.public.
En los logs, en el catalina.out observo lo siguiente:
2020-05-18 18:54:22,805 ERROR [extensions.webscripts.AbstractRuntime] [http-apr-8080-exec-3] Exception from executeScript: 04180083 Wrapped Exception (with status template): No enum constant org.alfresco.service.cmr.site.SiteVisibility.public
org.springframework.extensions.webscripts.WebScriptException: 04180083 Wrapped Exception (with status template): No enum constant org.alfresco.service.cmr.site.SiteVisibility.public
at org.springframework.extensions.webscripts.AbstractWebScript.createStatusException(AbstractWebScript.java:1138)
at org.springframework.extensions.webscripts.DeclarativeWebScript.execute(DeclarativeWebScript.java:171)
at org.alfresco.repo.web.scripts.RepositoryContainer$3.execute(RepositoryContainer.java:512)
at org.alfresco.repo.transaction.RetryingTransactionHelper.doInTransaction(RetryingTransactionHelper.java:464)
at org.alfresco.repo.web.scripts.RepositoryContainer.transactionedExecute(RepositoryContainer.java:587)
at org.alfresco.repo.web.scripts.RepositoryContainer.transactionedExecuteAs(RepositoryContainer.java:656)
at org.alfresco.repo.web.scripts.RepositoryContainer.executeScriptInternal(RepositoryContainer.java:428)
at org.alfresco.repo.web.scripts.RepositoryContainer.executeScript(RepositoryContainer.java:308)
at org.springframework.extensions.webscripts.AbstractRuntime.executeScript(AbstractRuntime.java:399)
at org.springframework.extensions.webscripts.AbstractRuntime.executeScript(AbstractRuntime.java:210)
at org.springframework.extensions.webscripts.servlet.WebScriptServlet.service(WebScriptServlet.java:132)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.alfresco.module.aosmodule.service.ContextRootFilter.doFilter(ContextRootFilter.java:93)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.alfresco.web.app.servlet.GlobalLocalizationFilter.doFilter(GlobalLocalizationFilter.java:68)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:218)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:110)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:506)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:169)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:445)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1115)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:637)
at org.apache.tomcat.util.net.AprEndpoint$SocketWithOptionsProcessor.run(AprEndpoint.java:2486)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:748)
Caused by: java.lang.IllegalArgumentException: No enum constant org.alfresco.service.cmr.site.SiteVisibility.public
at java.lang.Enum.valueOf(Enum.java:238)
at org.alfresco.service.cmr.site.SiteVisibility.valueOf(SiteVisibility.java:1)
at org.alfresco.repo.site.SiteServiceImpl.getSiteVisibility(SiteServiceImpl.java:1309)
at org.alfresco.repo.site.SiteServiceImpl.createSiteInfo(SiteServiceImpl.java:1258)
at org.alfresco.repo.site.SiteServiceImpl.listSites(SiteServiceImpl.java:1171)
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.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:317)
at org.springframework.aop.framework.ReflectiveMethodInvocation.invokeJoinpoint(ReflectiveMethodInvocation.java:183)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:150)
at net.sf.acegisecurity.intercept.method.aopalliance.MethodSecurityInterceptor.invoke(MethodSecurityInterceptor.java:80)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
at org.alfresco.repo.security.permissions.impl.ExceptionTranslatorMethodInterceptor.invoke(ExceptionTranslatorMethodInterceptor.java:53)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
at org.alfresco.repo.audit.AuditMethodInterceptor.proceed(AuditMethodInterceptor.java:201)
at org.alfresco.repo.audit.AuditMethodInterceptor.invoke(AuditMethodInterceptor.java:171)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
at org.alfresco.repo.transaction.CheckTransactionAdvice.invoke(CheckTransactionAdvice.java:54)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
at org.alfresco.repo.transaction.RetryingTransactionAdvice$1.execute(RetryingTransactionAdvice.java:71)
at org.alfresco.repo.transaction.RetryingTransactionHelper.doInTransaction(RetryingTransactionHelper.java:464)
at org.alfresco.repo.transaction.RetryingTransactionAdvice.invoke(RetryingTransactionAdvice.java:74)
at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:172)
at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)
at com.sun.proxy.$Proxy112.listSites(Unknown Source)
at org.alfresco.repo.web.scripts.site.SiteAdminSitesGet$1.doWork(SiteAdminSitesGet.java:115)
at org.alfresco.repo.web.scripts.site.SiteAdminSitesGet$1.doWork(SiteAdminSitesGet.java:112)
at org.alfresco.repo.security.authentication.AuthenticationUtil.runAs(AuthenticationUtil.java:555)
at org.alfresco.repo.web.scripts.site.SiteAdminSitesGet.executeImpl(SiteAdminSitesGet.java:110)
at org.springframework.extensions.webscripts.DeclarativeWebScript.execute(DeclarativeWebScript.java:64)
... 35 more
Alguien puede darme alguna pista de por donde mirar?
Creo, que con algunas pruebas, algun usuario que administra el sitio ha podido cambiar los permisos a la carpeta Sitios (porque veo que tienen un usuario que no es el habitual) y ha podido modificar algo, pero no sé si es eso o no (en ese caso, me interesaria saber que grupo/usuario tiene por defecto la carpeta Sitios del repositorio (ya que ahora mismo, veo que tiene asignado un "Grupo" de tipo "Colaborador".
Pero no sé si puede ser algo más o no.
Gracias por vuestra ayuda y atención.