Causes Problems

This plugin causes the pages to read, “Warning: Parameter 2 to wp_hide_post_Public::query_posts_join() expected to be a reference, value given in /var/www/html/wp-includes/class-wp-hook.php on line 286” at the top.

For real. Check the support section.

Try this plugin instead. https://www.ads-software.com/support/plugin/super-hide-post/