universal-react | get react app with rr4 , redux , saga , ssr | Server Side Rendering library

I was given the task to implement server-side rendering for a react application. I've followed the this tutorial: https://scotch.io/tutorials/react-on-the-server-for-beginners-build-a-universal-react-and-node-app and, afterwards, followed the exact steps on the actual application. Everything worked well with implementing the client-side rendering, but as soon as I continued with the server-side one, I got the following error: 'Reference error: window is not defined'
The problem is that the application uses scrollmagic, which is a client-side-only library (note: I added conditionals 'require' to any scrollmagic references in the code itself, but I can't find a way to bypass the module).
I thought about adding the scrollmagic library on the client-side, but as soon as I remove it I get an error from the 'require' statements.
I apologize if this is something obvious but I am new to JavaScript and have been searching for a couple of days and found nothing so far. If I can provide any additional information please let me know! Also, if you have any suggestions as to how I should handle this, I am all ears!

Best regards,
Andrew

I am learning react and created a mock up project but when I run the project I get the following error,my webpack.config.js file code is as follows,

I am new to React, so please don't judge strictly. I am rendering my React app on server and want execute code on frontend side. Application renders properly with styles and without warnings or errors, though with empty state since I am using API which should execute on front side and it is OK for now.

as I understand server renders component and since server rendered and mounted component on server and it is not calling componentDidMount() method which should do my API calls and other staff

this is my component