How to start RemoteControlAPI in .exe?

I tried "Remote Control API"plugin in 4.23.1.

I succeeded Remote Control via Insomnia in UE4 Editor.
But, in executable file, no response whenI entered WebControl.StartServer to commandline.

Plugin’s description is

"Description": "A suite of tools for controlling the Unreal Engine, both in Editor or at Runtime via a webserver. This allows users to control Unreal Engine remotely thru HTTP requests.  This functionality allows developers to control Unreal thru 3rd party applications and web services."    
```.  
It can not receive HTTP request yet?