all who are facing same problem as ‘chomiczek’ just make sure that you are using ‘menu’ element in passing array as parameter in ‘wp_nav_menu’ function call.
@chomiczek
in your case you should have below array parameters
<?php wp_nav_menu( array(‘menu’=>’MENU_NAME_HERE’ ,’container’ => ‘false’, ‘menu_class’ => ‘moja_klasa’, ‘menu_id’ => ‘menu’, ) ); ?>
notice
‘menu’=>’MENU_NAME_HERE’
hope this will help you
