how to make slider works on other pages?

It’s the greatest theme I’ve used!

I’m trying to put slider on other pages by using those code below :

<?php if( pinboard_get_option( 'slider' ) ) : ?>
    <?php get_template_part( 'slider' ); ?>
 <?php endif; ?>

But it seems not working properly, only one thumbnail of the first sticky post appears, and nothing more.

You can see the example here :

+ my home page, the slider works well : https://fususu.com
+ on page 2,3,4… it appears but not work well : https://fususu.com/page/2/
+ or in 404 page, it also appears but not work, too : https://fususu.com/404/

Any help would be much appreciated!

Thanks,