Dropdown items have the nav-link class, but they should only have 'dropdown-item' as class.

[Leonid Lezner]

Dropdown items have the nav-link class, but they should only have 'dropdown-item' as class.

      $item_classes = array( 'nav-link' );

      if ( $args->walker->has_children ) {
        $item_classes[] = 'dropdown-toggle';
      }

      if ( 0 < $depth ) {
        // Remove the nav-link class!!
        unset($item_classes[0]); 
        
        $item_classes[] = 'dropdown-item';
      }

[Javier Prieto]

Fixed! Thanks @leonidlezner