Hello again.
I’m using your source code https://miled.github.io/wordpress-social-login/themes.html
/* -----------------------------------------------------------------------------
* FONT AWESOME
* ------------------------------------------------------------------------- */
function wsl_use_fontawesome_icons( $provider_id, $provider_name, $authenticate_url )
{
?>
<a
rel = "nofollow"
href = "<?php echo $authenticate_url; ?>"
data-provider = "<?php echo $provider_id ?>"
class = "wp-social-login-provider wp-social-login-provider-<?php echo strtolower( $provider_id ); ?>"
>
<span>
<i class="fa fa-<?php echo strtolower( $provider_id ); ?> fa-lg"></i>  
</span>
</a>
<?php
}
add_filter( 'wsl_render_auth_widget_alter_provider_icon_markup', 'wsl_use_fontawesome_icons', 10, 3 );
but in this code Vkontakte (or vk.com) button didn’t show.
How can I fix this?