261 For React 16.8+ you can use the  Effect Hook  in function components: import React , { useEffect } from 'react' ; function Example ( ) {…

.env variable name should start with  REACT_APP_YOURVARIABLENAME REACT_APP_API_URL https://create-react-app.dev/docs/adding-custom-environment-variables/

ERROR Error: Uncaught (in promise): Error Error at XMLHttpRequest.onreadystatechange [as  #1103 this error is coming due to the AdBlocker extension off …