Discussion on: Build a Modern, Customized File Uploading User Interface in React with Plain CSS

I was able to follow through the tutorial despite a few issues here and there. One of the issues occurred after installing the react-md-spinner and classnames packages.
The error encountered was:

Cannot find module babel-preset-react-app/node_modules/@babel/runtime

The solution I found on the Create-React-App Github page under the issues tab was to install Babel-Runtime using the following command:

npm add @babel/runtime

Ps. Please add the command to the tutorial when using spinner and classnames packages in your tutorial.

npm i react-md-spinner classnames --save

It will be easier for beginner level programmers to follow through the tutorial.