When using the se:webservice macro you get the exception "Binding protocol not supported".

If you don't specify a bindingtype, the se:webservice macro automatically determines the appropriate binding based on the specified url.

If the specified url starts with "http", the WCF BasicHttpBinding will be used. If the url starts with "net.tcp", the WCF NetTcpBinding will be used. Otherwise, this UnsupportedProtocol exception will be raised, since http and net.tcp are the only supported protocols.

So, check the specified url. It should start with either http or net.tcp.