Download converter installer for windows:
Converter for Animate CC | Converter for After Effects

Unzip the installer package

Run install.exe -> Install Now

Open Animate CC or After Effects and save the animation file

Select extension on Window > Extensions > SVGAConverter

Select 输出路径 > 开始转换, Wait a moment, SVGA source file Will be generated in the directory you choose

Download converter installer for mac:
Converter for Animate | Converter for After Effects

Download, install and run ZXP Installer

Select Menu > File > Open, select the converter installer downloaded

Open Animate CC or After Effects and save the animation file

Select extension on Window > Extensions > SVGAConverter

Select 输出路径 > 开始转换, Wait a moment, SVGA source file Will be generated in the directory you choose