Problem z szablonem z Theme Forest – Błąd lini 35 w index.php

Strona: Szablon

Komunikat
Fatal error: Call to undefined function wp_get_theme() in /autoinstalator/wordpress3/wp-content/themes/nice_hotel/admin/index.php on line 35

Plik Index.php

<?php get_header(); ?>

	<?php //Display Page Header
		global $wp_query;
		$postid = $wp_query->post->ID;
		echo page_header( get_post_meta($postid, 'qns_page_header_image', true) );
		wp_reset_query();
	?>

	<!-- BEGIN .section -->
	<div class="section clearfix">

		<!-- BEGIN .main-content -->
		<div class="<?php echo sidebar_position('primary-content'); ?>">

			<?php load_template( get_template_directory() . '/includes/loop.php' ); ?>

		<!-- END .main-content -->
		</div>

		<?php get_sidebar(); ?>

	<!-- END .section -->
	</div>

<?php get_footer(); ?>

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