Don’t do this for your live site, highly recommended only for local development and testing.
Find this in wp-config.php:
define('WP_DEBUG', false);
Change it to:
// define('WP_DEBUG', false);
Now add this code after that:
// Enable WP_DEBUG mode define('WP_DEBUG', true); // Enable Debug logging to the /wp-content/debug.log file define('WP_DEBUG_LOG', true); // Disable display of errors and warnings define('WP_DEBUG_DISPLAY', false); @ini_set('display_errors',0); // Use dev versions of core JS and CSS files (only needed if you are modifying these core files) define('SCRIPT_DEBUG', true);