Local Business theme not work

Dear Sir. I using Local Business theme https://wordpress.org/themes/local-business/. It’s old theme and I install WP-PageNavi for nice pagination, but not work.
In blog.php I replace code:
*************************
<nav id=”nav-single”> <span class=”nav-previous”>
<?php next_posts_link(__(‘← Ранние записи’, ‘local-business’), $the_query->max_num_pages) ?>
</span> <span class=”nav-next”>
<?php previous_posts_link(__(‘Новые записи →’, ‘local-business’)); ?>
</span> </nav>
*************************
to <?php wp_pagenavi(); ?>

But I don’t see results((
Please, help, I want to care my theme whith your plugin.

Best regards, Dmitriy.

https://wordpress.org/plugins/wp-pagenavi/