Unable to login to the EAP Admin Console

Issue

• I cannot login to the EAP Admin Console, gives me the below error message:

JBoss EAP Admin Console 
Welcome JbossAdm [Logout] Internal Error
The application has encountered an error.

Please return to the main page to reset the application.

Error details:
javax.servlet.ServletException: Error reading 'currentPath' on type org.jboss.on.embedded.ui.NavigationAction_$$_javassist_seam_10

at javax.faces.webapp.FacesServlet.__AW_service(FacesServlet.java:277)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:83)
at org.jboss.seam.web.IdentityFilter.doFilter(IdentityFilter.java:40)
at org.jboss.seam.servlet.SeamFilter$FilterChainImpl.doFilter(SeamFilter.java:69)....

And in my server.log I see:

javax.management.InstanceAlreadyExistsException: rhq.pc:type=PluginContainer already registered.
java.lang.ClassCastException: org.rhq.plugins.platform.WindowsPlatformDiscoveryComponent cannot be cast to org.rhq.core.pluginapi.inventory.ResourceDiscoveryComponent
java.lang.ClassCastException: org.rhq.plugins.platform.LinuxPlatformDiscoveryComponent cannot be cast to org.rhq.core.pluginapi.inventory.ResourceDiscoveryComponent
java.lang.ClassCastException: org.rhq.plugins.platform.SolarisPlatformDiscoveryComponent cannot be cast to org.rhq.core.pluginapi.inventory.ResourceDiscoveryComponent
java.lang.ClassCastException: org.rhq.plugins.platform.HpuxPlatformDiscoveryComponent cannot be cast to org.rhq.core.pluginapi.inventory.ResourceDiscoveryComponent
java.lang.ClassCastException: org.rhq.plugins.platform.AixPlatformDiscoveryComponent cannot be cast to org.rhq.core.pluginapi.inventory.ResourceDiscoveryComponent
java.lang.ClassCastException: org.rhq.plugins.platform.BsdPlatformDiscoveryComponent cannot be cast to org.rhq.core.pluginapi.inventory.ResourceDiscoveryComponent
java.lang.ClassCastException: org.rhq.plugins.platform.MacOSXPlatformDiscoveryComponent cannot be cast to org.rhq.core.pluginapi.inventory.ResourceDiscoveryComponent
java.lang.ClassCastException: org.rhq.plugins.platform.JavaPlatformDiscoveryComponent cannot be cast to org.rhq.core.pluginapi.inventory.ResourceDiscoveryComponent
java.lang.IllegalStateException: Neither a native nor a Java platform was discovered - this should never happen. Known platform types are [ResourceType[id=0, category=Platform, name=Windows, plugin=Platforms], ResourceType[id=0, category=Platform, name=Linux, plugin=Platforms], ResourceType[id=0, category=Platform, name=Solaris, plugin=Platforms], ResourceType[id=0, category=Platform, name=HP-UX, plugin=Platforms], ResourceType[id=0, category=Platform, name=AIX, plugin=Platforms], ResourceType[id=0, category=Platform, name=FreeBSD, plugin=Platforms], ResourceType[id=0, category=Platform, name=Mac OS X, plugin=Platforms], ResourceType[id=0, category=Platform, name=Java, plugin=Platforms]].
javax.el.ELException: Error reading 'currentPath' on type org.jboss.on.embedded.ui.NavigationAction_$$_javassist_seam_10
Caused by: java.lang.IllegalArgumentException: ResourceTreeNode requires a Resource - null was passed into the constructor.
at org.jboss.on.embedded.ui.nav.ResourceTreeNode.<init>(ResourceTreeNode.java:47)
at org.jboss.on.embedded.ui.nav.PlatformResourceTreeNode.<init>(PlatformResourceTreeNode.java:38)