related posts not shown by function in single custom post type

this is how i have registered the post type and taxonomy

add_action( 'init', 'cptui_register_my_cpts' );
function cptui_register_my_cpts() {
	$labels = array(
		"name" => "Hindi Songs",
		"singular_name" => "Hindi Song",
		"menu_name" => "Hindi Songs",
		"all_items" => "All Hindi Songs",
		"add_new" => "Add New",
		"add_new_item" => "Add New HS",
		"edit" => "Edit",
		"edit_item" => "Edit HS",
		"new_item" => "New HS",
		"view" => "view",
		"view_item" => "View HS",
		"search_items" => "Search Hindi Songs",
		"not_found" => "No Songs Found",
		"not_found_in_trash" => "No Songs Found in Trash",
		"parent" => "Parent Song",
		);

	$args = array(
		"labels" => $labels,
		"description" => "",
		"public" => true,
		"show_ui" => true,
		"has_archive" => true,
		"show_in_menu" => true,
		"exclude_from_search" => false,
		"capability_type" => "post",
		"map_meta_cap" => true,
		"hierarchical" => true,
		"rewrite" => array( "slug" => "hindi-songs", "with_front" => true ),
		"query_var" => true,
		"menu_position" => 7,
		"supports" => array( "title", "editor", "excerpt", "trackbacks", "custom-fields", "comments", "revisions", "thumbnail", "author", "page-attributes", "post-formats" ),
		"taxonomies" => array( "artists", "movies", "hs-category", "lyricists", "moods", "music-directors", "types", "hindi-chords", "hs-types", "hs-difficulty", "scales", "version", "contributor", "instructor", "capo" )
	);
	register_post_type( "hindi-songs", $args );

// End of cptui_register_my_cpts()
}

add_action( 'init', 'cptui_register_my_taxes' );
function cptui_register_my_taxes() {

	$labels = array(
		"name" => "Versions",
		"label" => "Versions",
		"menu_name" => "Versions",
		"all_items" => "All Versions",
		"edit_item" => "Edit Version",
		"view_item" => "View Version",
		"update_item" => "Update Version name",
		"add_new_item" => "Add New Version",
		"new_item_name" => "New Version name",
		"parent_item" => "Parent Version",
		"parent_item_colon" => "Parent Version:",
		"search_items" => "Search Versions",
		"popular_items" => "Popular Versions",
		"separate_items_with_commas" => "Separate Versions with commas",
		"add_or_remove_items" => "Add or remove Versions",
		"choose_from_most_used" => "Choose from most used",
		"not_found" => "No version found",
		);

	$args = array(
		"labels" => $labels,
		"hierarchical" => false,
		"label" => "Versions",
		"show_ui" => true,
		"query_var" => true,
		"rewrite" => array( 'slug' => 'version', 'with_front' => true ),
		"show_admin_column" => false,
	);
	register_taxonomy( "version", array( "hindi-songs", "english-songs" ), $args );

// End cptui_register_my_taxes
}

hi thanks for your continous support.

How will i come to know if it’s showing the right post id. Sorry i m beginner. I tested the both of the below code one by one u mentioned in previous reply, it didn’t display anything.. The result was same blank.

$ p o s t _ i d = $ p o s t - > I D ; / / p o s t i d a v a i l a b l e i n s i d e t h e l o o p . e c h o ' P o s t I D = ' . $ p o s t _ i d ;

$ p o s t _ i d = g e t _ t h e _ I D ( ) ; e c h o ' P o s t I D = ' . $ p o s t _ i d ;

And i have a single same term conecting two posts.. I m using post_per_page => 10 and in the wp reading setting default posts are set to 11.
I don’t think term and number of posts should b a problem bcoz it displays the post with shortcode. I also think it has to do something with post id.

i typed with mobile so it added the space by itself but.. On pc i copy and pasted the same code by keesiemeijer one by one.. it didn’t display anything.

no it doesn’t display anything the output is pure blank.. Can u please tell me ur email id.. I’ll send u username and password.. If u can take a close look.. Thanks for giving ur precious time.

1> link to page here

2>yes single-hindi-songs.php is loaded. Below is the whole code of single-hindi-songs.php

3> Yes do_shortcode() in the template displays the related posts.

single-hindi-songs.php

<?php get_header(); ?>

<section class="content">

	<div class="page-title pad group">	

	<ul class="meta-single group">

	<?php if ( comments_open() && ( ot_get_option( 'comment-count' ) != 'off' ) ): ?>

	<li class="comments"><a href="<?php comments_link(); ?>"><i class="fa fa-comments-o"></i><?php comments_number( '0', '1', '%' ); ?></a></li>

	<?php endif; ?>

	</ul>

	</div>

	<div class="pad group">

		<?php while ( have_posts() ): the_post(); ?>

			<article <?php post_class(); ?>>	

				<div class="post-inner group">

					<h1 class="post-title"><?php the_title(); ?></h1>

					<p class="post-byline">

					<?php _e('by','hueman'); ?> <?php the_author_posts_link(); ?> ·  

					</p>

					<?php if( get_post_format() ) { get_template_part('inc/post-formats'); } ?>

					    <div class="clear"></div>

					<div class="entry-inner">

							<?php
							// check if the function exists
							if ( function_exists( 'km_rpbt_related_posts_by_taxonomy' ) ) {

								$args = array(
									'post_types' => 'hindi-songs',
									'posts_per_page' => 10,

								);

								$taxonomies = array('version');
								$post_id = $post->ID;
								$related_posts = km_rpbt_related_posts_by_taxonomy( $post_id, $taxonomies, $args );

								if ( $related_posts ) {

									echo '<ul>';

									foreach ( $related_posts as $related ) {

										echo '<li><a style="color:green;" href="' . get_permalink( $related->ID ) . '">' . $related->post_title . '</a></li>';
									}

									echo '</ul>';
								}
							}
							?>

							<div class="clear"></div>

							<?php the_content(); ?>

							<?php wp_link_pages(array('before'=>'<div class="post-pages">'.__('Pages:','hueman'),'after'=>'</div>')); ?>

						<?php if ( ot_get_option('sharrre') != 'off' ) { get_template_part('inc/sharrre'); } ?>

						<div class="clear"></div>				

					</div><!--/.entry-->

				</div><!--/.post-inner-->

			</article><!--/.post-->		

<div class= "mysharediv"> 

<?php { echo '<img src="http://eastwst.cf/wp-content/uploads/sharing-tag-line-1.png">'; }; ?>

<?php echo sharing_display(); ?>

</div>

		<?php endwhile; ?>

		<div class="clear"></div>

		<?php the_tags('<p class="post-tags"><span>'.__('Tags:','hueman').'</span> ','','</p>'); ?>

		<?php if ( ( ot_get_option( 'author-bio' ) != 'off' ) && get_the_author_meta( 'description' ) ): ?>

			<div class="author-bio">

				<div class="bio-avatar"><?php echo get_avatar(get_the_author_meta('user_email'),'128'); ?></div>

				<p class="bio-name"><?php the_author_meta('display_name'); ?></p>

				<p class="bio-desc"><?php the_author_meta('description'); ?></p>

				<div class="clear"></div>

			</div>

		<?php endif; ?>

		 <ul class="post-nav group">

		 <li class="next"><?php next_post_link('%link', '<i class="fa fa-chevron-right"></i><strong>'.__('Next song', 'hueman').'</strong> <span>%title</span>'); ?></li>

		 <li class="previous"><?php previous_post_link('%link', '<i class="fa fa-chevron-left"></i><strong>'.__('Previous song', 'hueman').'</strong> <span>%title</span>'); ?></li>

		 </ul>

		<?php comments_template('/comments.php',true); ?>

	</div><!--/.pad-->

</section><!--/.content-->

<?php if ( is_singular( array( 'hindi-songs', 'english-songs' ) ) ) { get_template_part('sidebar-hs');} else { get_sidebar();} ?>

	<script async src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script>
	<script src="/wp-content/themes/childhueman/my-custom-js/jquery.sticky-kit.js" async></script>
	<script src="/wp-content/themes/childhueman/my-custom-js/collapso-heading.js" async></script>

<?php get_footer(); ?>

got it resolved. 🙂 thanks for the great support giving this plugin five star. 🙂