Administrator that created our bitbucket workspace and account initially is leaving. We are trying to remove access for him in bitbucket. We navigated to "Workspace Settings" on Bitbucket and then to "Users on Plan". But, we are not able to remove the account. We click on Remove (X button) on "Users on Plan" but nothing happens, we continue to see their account. We see a message: "As an admin of this workspace, <User Name> has direct admin access to all repositories.". How do we remove this user ?