Compiled plugin for UE 4.20.1 GameSpark Plugin for ue4.20.1

The plugin does not compile for version 4.21, an error in OnlineSubSystems. You need to ask the developers to fix the plugin to work with the current version of ue4.

How can we make it work on 4.21 ?

How should I add this ? main steps please

Create a folder called Pluins in your project folder. And unpack the contents of my archive there.