When trying to access a section of the client, such as a search, Agent Configuration, Coordinator Configuration, etc, the following error is shown "Unable to aquire exclusive access to <component name>. Locked by: <Username> (IPAddress). Changes will not be permitted"
Another client/user has already opened the component for editing from another Client connection, this is expected behaviour.
The other user needs to navigate away from the component or close their Client to release the lock and allow another user access.