composeEnhancers (ok)

You are likely running your app in dev mode in a browser that doesn't have Redux DevTools installed.

https://stackoverflow.com/questions/57628279/composeenhancers-is-not-a-function-in-reactjs

const composeEnhancers = process.env.NODE_ENV === 'development' ? window.__REDUX_DEVTOOLS_EXTENSION_COMPOSE__ : null || compose;