BuddyPress.org

The only way how to fix is to disable ajax woocommerce checkout.

<?php
/**
 * Disable checkout script, because of conflict BuddyPress and Woocommerce Ajax conflict.
 */
function disable_checkout_script(){
    wp_dequeue_script( 'wc-checkout' );
}
add_action( 'wp_enqueue_scripts', 'disable_checkout_script' );
?>