Module not found: Can't resolve '*.module.css' in 'C:\Users\subha\Desktop\React js Course\blog\src\component' code example

Example 1: module not found: can't resolve 'react' in 'c:\users\pavlos\desktop\reactjs\hwr\reactproject2\src'

type:  npm install react
next command type : npm install react-dom
that's the solution.

Example 2: ./src/App.js Module not found: Can't resolve '@fullcalendar/core/main.css' in 'c:\react-souf\src'

./src/App.js
Module not found: Can't resolve '@fullcalendar/core/main.css' in 'c:\react-souf\src'