Fatal error: Uncaught Error: Call to undefined function _deprecated_file() in /home/KatarzynaCzajka/public_html/katarzynaczajka/wordpress/wp-includes/class-smtp.php:6 Stack trace: #0 {main} thrown in /home/KatarzynaCzajka/public_html/katarzynaczajka/wordpress/wp-includes/class-smtp.php on line 6