Display sidebar that created in functions.php

Here’s the way i would code it. Tested

Add to functions file

add_action( 'widgets_init', 'wpsites_add_widget' );

function wpsites_add_widget() {

register_sidebar(array(
'name'=>'Sidebar-Aries',
'id' => 'sidebar-aries',
'description' =>'Display all the contents of sidebar at Aries page.',
'before_widget' => '',
'after_widget' => '',
'before_title' => '',
'after_title' => '',
));
}

Or you could use this code in your template and change the classes to match your existing widget

Option 1 – Add to template

<?php if ( is_active_sidebar( 'sidebar-aries' ) ) : ?>
<ul id="sidebar">
    <?php dynamic_sidebar( 'sidebar-aries' ); ?>
</ul>
<?php endif; ?>

Option 2 – Add to template

You could also add a conditional tag to control which pages your widget outputs

<?php if ( is_active_sidebar( 'sidebar-aries' ) && is_conditional() ) : ?>
<ul id="sidebar">
    <?php dynamic_sidebar( 'sidebar-aries' ); ?>
</ul>
<?php endif; ?>

Replace is_conditional() with your conditional tag