Not Working in my Theme!

Hi, i need help i have theme created by zero, but i active this plugin but is not show in my website.

<?php
wp_nav_menu(
array(
 'menu' => 41,
 'menu_class' => 'navbar-nav me-auto mb-2 mb-lg-0',
 'menu_id' => 'menu_header',
 'container_class' => 'collapse navbar-collapse',
 'container_id' => 'navbarSupportedContent'
)
); ?>

In this case, i have using wp_nav_menu function default for menu wordpress, but whem i try using max mega menu, not working, not show error.

Please i need help!

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