blog pagination doesnt work

i have SEOWP theme – Lumberman Designs author, bought it on envato market
and now i have a problem with blog pagination
Same posts on all blog pages.

Index.php
// posts pagination rendered by Live Composer
$nextpostlink = get_next_posts_link();
$previouspostlink = get_previous_posts_link();
site – http://in-pr.ru/blog/
pages 1 2 3 – same posts.
plz help

https://ww.wp.xz.cn/plugins/live-composer-page-builder/