Error: Requires Babel “^7.0.0-0”, but was loaded with “6.26.3”
Fix
npm install --save-dev babel-loader@^8.0.0-beta
https://webpack.js.org/loaders/babel-loader/
You are using babel-core instead of @babel/core, installing babel-loader@^8.0.0-beta will use @babel/core and should fix the issue
