AgentS on "[Plugin: Polylang] Update from 1.1 to 1.4.2 nav menu problem"

Hello,
When I update my Polylang plugin from version 1.1 to 1.4.2 everything else seems to work except it doesn't change navigation menu for other languages.

I am making menus in functions.php with following code:

function site_menu() {
  register_nav_menu('header-menu',__( 'Main menu' ));
}
add_action( 'init', 'site_menu' );

I also find problems when I update from 1.1 to 1.2 or some other version between these two.

https://wordpress.org/plugins/polylang/