Fix for conflict with Visual Composer

visual-composer-fix.php

/*
 Author: Lukas Pawlik <lukas@time.ly>
 Please put this code in your theme functions.php file.
 */
add_filter( 'the_excerpt', '__ai1ec_vcomposer_fix', 0, 1);

function __ai1ec_vcomposer_fix( $content ) {
    if ( ! empty( $content ) ) {
        return $content;
    }
    global $post;
    if ( strpos( $post->post_content, '[ai1ec' ) !== false ) {
        return ' ';
    }

    return $content;
}