Call to undefined function inner_page_menu()

Hello. Good plugin!
The plugin is activated https://xiii.myjino.ru/
When insert the page displays an error “Fatal error: Call to undefined function inner_page_menu() in /home/users/x/xiii/docs/wp-content/themes/upright/sidebar.php on line 8″

sidebar.php
<?php
/**
* The Sidebar containing the main widget areas.
*/
?>
<?php if ( is_active_sidebar( ‘sidebar-1’ ) ) : ?>
<div id=”secondary” class=”widget-area” role=”complementary”>
<?php inner_page_menu(); ?>
<?php dynamic_sidebar( ‘sidebar-1’ ); ?>
</div>

<?php endif; ?>

<?php
/**
* The Sidebar containing the main widget areas.
*/
?>
<?php if ( is_active_sidebar( ‘sidebar-1’ ) ) : ?>
<div id=”secondary” class=”widget-area” role=”complementary”>
<?php inner_page_menu(); ?>
<?php dynamic_sidebar( ‘sidebar-1’ ); ?>
</div>

<?php endif; ?>

<?php
/**
* The Sidebar containing the main widget areas.
*/
?>
<?php if ( is_active_sidebar( ‘sidebar-1’ ) ) : ?>
<div id=”secondary” class=”widget-area” role=”complementary”>
<?php inner_page_menu(); ?>
<?php dynamic_sidebar( ‘sidebar-1’ ); ?>
</div>

<?php endif; ?>

What has been done is not it?