Compiling Voice Applications 
You must compile your voice application to check for validation errors. You must solve any errors found before deploying the voice application.
Prerequisites
You have created a voice application
More information: Creating Voice Applications
You have enabled your voice application
More information: Enabling Voice Applications
The voice application to be compiled is open in the Visual Composer
Procedure
From the task panel toolbar, choose Deploy.
From the task panel, choose the Compile button.
If there are any compilation errors, resolve them.