Error log shows the following:

Unable to render embedded object: File (MESSAGE [SCR] Found components with duplicated names) not found. Details:
Component1 : Component[
name = org.jboss.ide.eclipse.as.management.as7.service
activate = activate
deactivate = deactivate
modified =
configuration-policy = optional
factory = null
autoenable = true
immediate = true
implementation = org.jboss.ide.eclipse.as.internal.management.as71.JBoss71ManagerService
state = Unsatisfied
properties =

serviceFactory = false
serviceInterface = [org.jboss.ide.eclipse.as.core.server.v7.management.IJBoss7ManagerService]
references = null
located in bundle = org.jboss.ide.eclipse.as.management.as71_2.3.0.qualifier [821]
]
Component2: Component[
name = org.jboss.ide.eclipse.as.management.as7.service
activate = activate
deactivate = deactivate
modified =
configuration-policy = optional
factory = null
autoenable = true
immediate = true
implementation = org.jboss.ide.eclipse.as.internal.management.as7.JBoss7ManagerService
state = Unsatisfied
properties =

serviceFactory = false
serviceInterface = [org.jboss.ide.eclipse.as.core.server.v7.management.IJBoss7ManagerService]
references = null
located in bundle = org.jboss.ide.eclipse.as.management.as7_2.3.0.qualifier [819]
]