Access Denied error after enabling RBAC for management interface in EAP 6/7

Issue

• "Access Denied - Insufficient privileges to access this interface" from Administration Console after replacing "simple" with "rbac" for the access-control provider in the standalone.xml.
• After Enabling RBAC in JBoss EAP 6.4, unable to Define a role-mapping and getting the following error :

[standalone@localhost:9999 /] /core-service=management/access=authorization/role-mapping=SuperUser/i
nclude=JBoss_Group:add(name=JBoss_Group,realm=ldap_security_realm,type=GROUP)
Failed to get the list of the operation properties: "JBAS014807: Management resource '[
    ("core-service" => "management"),
    ("access" => "authorization"),
    ("role-mapping" => "SuperUser"),
    ("include" => "JBoss_Group")
]' not found"

• When try to access JBoss Management console we are getting the following error message

Access denied: insufficient privileges to access this interface