I'm running jboss-fuse-6.2.0.redhat-118 as a standalone.
I've created a Fabric, using the following command:

fabric:create --new-user admin --new-user-password admin --new-user-role Administrator --resolver manualip --manual-ip 127.0.0.1 --wait-for-provisioning

After the Fabric has been created, I logged in to the Management Console, I got the following error popping up all the time, and appearing in the log:

[RHBranding] Red Hat theme loaded
[Core] Management Console started
[RBAC] Using mbean org.apache.karaf:type=security,area=jmx,name=root for client-side role based access control
[Core] Operation currentContainer() failed due to: java.lang.Exception : Insufficient roles/credentials for operation
[Core] Operation restApiUrl failed due to: java.lang.Exception : Insufficient roles/credentials for operation
[Core] Operation versions(java.util.List) failed due to: java.lang.Exception : Insufficient roles/credentials for operation
[Core] Operation restApiUrl failed due to: java.lang.Exception : Insufficient roles/credentials for operation
[Core] Operation versions(java.util.List) failed due to: java.lang.Exception : Insufficient roles/credentials for operation
[Core] Operation versions(java.util.List) failed due to: java.lang.Exception : Insufficient roles/credentials for operation
[Core] Operation versions(java.util.List) failed due to: java.lang.Exception : Insufficient roles/credentials for operation
[Core] Operation versions(java.util.List) failed due to: java.lang.Exception : Insufficient roles/credentials for operation
[Core] Operation versions(java.util.List) failed due to: java.lang.Exception : Insufficient roles/credentials for operation
[Core] Operation versions(java.util.List) failed due to: java.lang.Exception : Insufficient roles/credentials for operation
[Core] Operation versions(java.util.List) failed due to: java.lang.Exception : Insufficient roles/credentials for operation
...

The Management Console is tied up by this and all I get are errors.

As an addendum to this, I have downloaded jboss-fuse-6.2.0.redhat-111 and followed the same process, with the same results.