Example 3.1 shows configuration of HTTP API like this:

<management-interfaces>
    [...]
    <http-interface interface="management" port="9990"/>
<management-interfaces>


Although according to XML schema, the valid configuration is differen

<management-interfaces>
  [...]
  <http-interface security-realm="ManagementRealm">
     <socket-binding http="management-http"/>
  </http-interface>
</management-interfaces>


Similarly for example 3.2