Try to replace with this one

add_filter( 'basel_header_configuration', 'basel_custom_header_configuration', 1, 1 );

function basel_custom_header_configuration() {

		return array(
				'container' => array(
					'wrapp-header' => array(
						'logo',
						'widget_area',
						'right-column' => array(
                                                        'header_links',
							'search',
							'wishlist',
							'cart',
							'mobile_icon',
						)
					)
				),
				'navigation-wrap' => array(
					'container' => array(
						'main_nav'
					)
				)
		);
}