Enabling role-based authorization for BRM (i.e. Guvnor) causes "Authorization check failed for permission[org.drools.guvnor.server.security.AdminType@55b47724,admin]" exception

Issue

• The role-based authorization has been enabled inside $JBOSS_HOME/server/$PROFILE/deploy/jboss-brms.war/WEB-INF/components.xml file, like this:

    <!-- SECURITY AUTHORIZATION CONFIGURATION -->
    <!--
        This is used to enable or disable role-based authorization. By default
        it is disabled.
    -->
    <component name="org.jboss.seam.security.roleBasedPermissionResolver">
        <property name="enableRoleBasedAuthorization">true</property>
    </component>

Before making this change, admin user was able to access the tabs like User Permission or Event Log from Administration section of the BRM (i.e. Guvnor) . But, currently it does not even allow admin user to access those features from Administration section , saying Sorry, insufficient permissions to perform this action.
Also, it gives the below ERROR inside server log:

ERROR [org.drools.guvnor.server.RepositoryServiceServlet] (http-127.0.0.1-8080-5) Service method 'public abstract org.drools.guvnor.client.rpc.PageResponse org.drools.guvnor.client.rpc.RepositoryService.showLog(org.drools.guvnor.client.rpc.PageRequest)' threw an unexpected exception: org.jboss.seam.security.AuthorizationException: Authorization check failed for permission[org.drools.guvnor.server.security.AdminType@349b3786,admin]
org.jboss.seam.security.AuthorizationException: Authorization check failed for permission[org.drools.guvnor.server.security.AdminType@349b3786,admin]
    at org.jboss.seam.security.Identity.checkPermission(Identity.java:590)
    at org.drools.guvnor.server.ServiceSecurity.checkSecurityIsAdmin(ServiceSecurity.java:33)
    at org.drools.guvnor.server.ServiceImplementation.showLog(ServiceImplementation.java:492)
...

ERROR [STDERR] (http-127.0.0.1-8080-5) com.google.gwt.user.server.rpc.UnexpectedException: Service method 'public abstract org.drools.guvnor.client.rpc.PageResponse org.drools.guvnor.client.rpc.RepositoryService.showLog(org.drools.guvnor.client.rpc.PageRequest)' threw an unexpected exception: org.jboss.seam.security.AuthorizationException: Authorization check failed for permission[org.drools.guvnor.server.security.AdminType@55b47724,admin]
        at com.google.gwt.user.server.rpc.RPC.encodeResponseForFailure(RPC.java:385)
    at com.google.gwt.user.server.rpc.RPC.invokeAndEncodeResponse(RPC.java:588)
...
        Caused by: org.jboss.seam.security.AuthorizationException: Authorization check failed for permission[org.drools.guvnor.server.security.AdminType@55b47724,admin]
    at org.jboss.seam.security.Identity.checkPermission(Identity.java:590)
    at org.drools.guvnor.server.ServiceSecurity.checkSecurityIsAdmin(ServiceSecurity.java:33)
    at org.drools.guvnor.server.ServiceImplementation.showLog(ServiceImplementation.javGuvnora:492)
...

Is there any way to solve this issue?