The Social Login is using internal class

INFO: Deploying web application directory /usr/local/apache-tomcat-7.0.42/webapps/xwiki
2015-01-09 12:45:34,662 [localhost-startStop-1] WARN  ltInstalledExtensionRepository - Invalid extension [org.xwiki.enterprise:xwiki-enterprise-ui-mainwiki-6.2.4] on namespace [wiki:xwiki] (InvalidExtensionException: Dependency [org.xwiki.platform:xwiki-platform-oldcore-[6.2.4]] is incompatible with the core extension [org.xwiki.platform:xwiki-platform-legacy-oldcore-6.4-milestone-3]) 
2015-01-09 12:45:34,681 [localhost-startStop-1] WARN  ltInstalledExtensionRepository - Invalid extension [org.xwiki.enterprise:xwiki-enterprise-ui-common-6.2.4] on namespace [wiki:xwiki] (InvalidExtensionException: Dependency [org.xwiki.platform:xwiki-platform-oldcore-[6.2.4]] is incompatible with the core extension [org.xwiki.platform:xwiki-platform-legacy-oldcore-6.4-milestone-3]) 
2015-01-09 12:45:36,364 [localhost-startStop-1] ERROR .o.i.DefaultObservationManager - Failed to lookup listeners 
org.xwiki.component.manager.ComponentLookupException: Failed to lookup component [role = [interface org.xwiki.observation.EventListener] hint = [org.xwiki.social.authentication.internal.LogoutActionLister]]
	at org.xwiki.component.embed.EmbeddableComponentManager.getInstanceMap(EmbeddableComponentManager.java:216) ~[xwiki-commons-legacy-component-default-6.4-milestone-3.jar:na]
	at org.xwiki.component.embed.EmbeddableComponentManager.getInstanceList(EmbeddableComponentManager.java:198) ~[xwiki-commons-legacy-component-default-6.4-milestone-3.jar:na]
	at org.xwiki.observation.internal.DefaultObservationManager.initializeListeners(DefaultObservationManager.java:164) [xwiki-commons-observation-local-6.4-milestone-3.jar:na]
	at org.xwiki.observation.internal.DefaultObservationManager.getListenersByEvent(DefaultObservationManager.java:131) [xwiki-commons-observation-local-6.4-milestone-3.jar:na]
	at org.xwiki.observation.internal.DefaultObservationManager.notify(DefaultObservationManager.java:267) [xwiki-commons-observation-local-6.4-milestone-3.jar:na]
	at org.xwiki.observation.internal.DefaultObservationManager.notify(DefaultObservationManager.java:321) [xwiki-commons-observation-local-6.4-milestone-3.jar:na]
	at org.xwiki.container.servlet.XWikiServletContextListener.contextInitialized(XWikiServletContextListener.java:118) [xwiki-platform-container-servlet-6.4-milestone-3.jar:na]
	at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4939) [catalina.jar:7.0.42]
	at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5434) [catalina.jar:7.0.42]
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) [catalina.jar:7.0.42]
	at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:901) [catalina.jar:7.0.42]
	at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877) [catalina.jar:7.0.42]
	at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:633) [catalina.jar:7.0.42]
	at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1113) [catalina.jar:7.0.42]
	at org.apache.catalina.startup.HostConfig$DeployDirectory.run(HostConfig.java:1671) [catalina.jar:7.0.42]
	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471) [na:1.7.0_72]
	at java.util.concurrent.FutureTask.run(FutureTask.java:262) [na:1.7.0_72]
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) [na:1.7.0_72]
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) [na:1.7.0_72]
	at java.lang.Thread.run(Thread.java:745) [na:1.7.0_72]
Caused by: org.xwiki.component.manager.ComponentLookupException: Failed to lookup component [org.xwiki.social.authentication.internal.DefaultSocialAuthManager] identified by [role = [interface org.xwiki.social.authentication.SocialAuthenticationManager] hint = [default]]
	at org.xwiki.component.embed.EmbeddableComponentManager.getComponentInstance(EmbeddableComponentManager.java:380) ~[xwiki-commons-legacy-component-default-6.4-milestone-3.jar:na]
	at org.xwiki.component.embed.EmbeddableComponentManager.getInstance(EmbeddableComponentManager.java:190) ~[xwiki-commons-legacy-component-default-6.4-milestone-3.jar:na]
	at org.xwiki.component.embed.EmbeddableComponentManager.createInstance(EmbeddableComponentManager.java:344) ~[xwiki-commons-legacy-component-default-6.4-milestone-3.jar:na]
	at org.xwiki.component.embed.EmbeddableComponentManager.getComponentInstance(EmbeddableComponentManager.java:410) ~[xwiki-commons-legacy-component-default-6.4-milestone-3.jar:na]
	at org.xwiki.component.embed.EmbeddableComponentManager.getInstanceMap(EmbeddableComponentManager.java:214) ~[xwiki-commons-legacy-component-default-6.4-milestone-3.jar:na]
	... 19 common frames omitted
Caused by: org.xwiki.component.manager.ComponentLookupException: Failed to lookup component [org.xwiki.social.authentication.internal.DefaultSocialAuthConfiguration] identified by [role = [interface org.xwiki.social.authentication.SocialAuthConfiguration] hint = [default]]
	at org.xwiki.component.embed.EmbeddableComponentManager.getComponentInstance(EmbeddableComponentManager.java:380) ~[xwiki-commons-legacy-component-default-6.4-milestone-3.jar:na]
	at org.xwiki.component.embed.EmbeddableComponentManager.getInstance(EmbeddableComponentManager.java:190) ~[xwiki-commons-legacy-component-default-6.4-milestone-3.jar:na]
	at org.xwiki.component.embed.EmbeddableComponentManager.createInstance(EmbeddableComponentManager.java:344) ~[xwiki-commons-legacy-component-default-6.4-milestone-3.jar:na]
	at org.xwiki.component.embed.EmbeddableComponentManager.getComponentInstance(EmbeddableComponentManager.java:410) ~[xwiki-commons-legacy-component-default-6.4-milestone-3.jar:na]
	at org.xwiki.component.embed.EmbeddableComponentManager.getComponentInstance(EmbeddableComponentManager.java:378) ~[xwiki-commons-legacy-component-default-6.4-milestone-3.jar:na]
	... 23 common frames omitted
Caused by: org.xwiki.component.manager.ComponentLookupException: Failed to lookup component [org.xwiki.social.authentication.internal.SocialAuthConfigurationSource] identified by [role = [interface org.xwiki.configuration.ConfigurationSource] hint = [socialAuth]]
	at org.xwiki.component.embed.EmbeddableComponentManager.getComponentInstance(EmbeddableComponentManager.java:380) ~[xwiki-commons-legacy-component-default-6.4-milestone-3.jar:na]
	at org.xwiki.component.embed.EmbeddableComponentManager.getInstance(EmbeddableComponentManager.java:190) ~[xwiki-commons-legacy-component-default-6.4-milestone-3.jar:na]
	at org.xwiki.component.embed.EmbeddableComponentManager.createInstance(EmbeddableComponentManager.java:344) ~[xwiki-commons-legacy-component-default-6.4-milestone-3.jar:na]
	at org.xwiki.component.embed.EmbeddableComponentManager.getComponentInstance(EmbeddableComponentManager.java:410) ~[xwiki-commons-legacy-component-default-6.4-milestone-3.jar:na]
	at org.xwiki.component.embed.EmbeddableComponentManager.getComponentInstance(EmbeddableComponentManager.java:378) ~[xwiki-commons-legacy-component-default-6.4-milestone-3.jar:na]
	... 27 common frames omitted
Caused by: org.xwiki.component.manager.ComponentLookupException: Failed to lookup component [org.xwiki.social.authentication.internal.SocialAuthDocumentConfigurationSource] identified by [role = [interface org.xwiki.configuration.ConfigurationSource] hint = [socialAuthDocument]]
	at org.xwiki.component.embed.EmbeddableComponentManager.getComponentInstance(EmbeddableComponentManager.java:380) ~[xwiki-commons-legacy-component-default-6.4-milestone-3.jar:na]
	at org.xwiki.component.embed.EmbeddableComponentManager.getInstance(EmbeddableComponentManager.java:190) ~[xwiki-commons-legacy-component-default-6.4-milestone-3.jar:na]
	at org.xwiki.component.embed.EmbeddableComponentManager.createInstance(EmbeddableComponentManager.java:344) ~[xwiki-commons-legacy-component-default-6.4-milestone-3.jar:na]
	at org.xwiki.component.embed.EmbeddableComponentManager.getComponentInstance(EmbeddableComponentManager.java:410) ~[xwiki-commons-legacy-component-default-6.4-milestone-3.jar:na]
	at org.xwiki.component.embed.EmbeddableComponentManager.getComponentInstance(EmbeddableComponentManager.java:378) ~[xwiki-commons-legacy-component-default-6.4-milestone-3.jar:na]
	... 31 common frames omitted
Caused by: java.lang.AbstractMethodError: null
	at org.xwiki.configuration.internal.AbstractDocumentConfigurationSource.initialize(AbstractDocumentConfigurationSource.java:130) ~[xwiki-platform-configuration-default-6.4-milestone-3.jar:na]
	at org.xwiki.component.embed.InitializableLifecycleHandler.handle(InitializableLifecycleHandler.java:39) ~[xwiki-commons-legacy-component-default-6.4-milestone-3.jar:na]
	at org.xwiki.component.embed.EmbeddableComponentManager.createInstance(EmbeddableComponentManager.java:355) ~[xwiki-commons-legacy-component-default-6.4-milestone-3.jar:na]
	at org.xwiki.component.embed.EmbeddableComponentManager.getComponentInstance(EmbeddableComponentManager.java:410) ~[xwiki-commons-legacy-component-default-6.4-milestone-3.jar:na]
	at org.xwiki.component.embed.EmbeddableComponentManager.getComponentInstance(EmbeddableComponentManager.java:378) ~[xwiki-commons-legacy-component-default-6.4-milestone-3.jar:na]
	... 35 common frames omitted
Jan 09, 2015 12:45:36 PM org.apache.catalina.startup.HostConfig deployDirectory
INFO: Deploying web application directory /usr/local/apache-tomcat-7.0.42/webapps/ROOT
Jan 09, 2015 12:45:36 PM org.apache.coyote.AbstractProtocol start
INFO: Starting ProtocolHandler ["http-bio-8080"]
Jan 09, 2015 12:45:36 PM org.apache.coyote.AbstractProtocol start
INFO: Starting ProtocolHandler ["ajp-bio-8009"]
Jan 09, 2015 12:45:36 PM org.apache.catalina.startup.Catalina start
INFO: Server startup in 30383 ms