Receiving "Fatal error: Call to undefined function..." Error on listings pages

All Listings in subdirectory giving fatal error

Fatal error: Call to undefined function get_author_directory_link() in /home1/bcosc/public_html/wp-content/plugins/directory/core/template-tags.php on line 249

example: http://bcosc.com/memberlistings/listing/founding-fathers-auto-service/

line 249 starts with $alink = get_author_directory_link see below for full section code

*/
function the_dr_posted_on() {

	$alink = get_author_directory_link( get_the_author_meta( 'ID' ) ) ;

	printf( __( '<span class="%1$s">Posted on</span> %2$s <span class="meta-sep">by</span> %3$s', DR_TEXT_DOMAIN ),
	'meta-prep meta-prep-author',
	sprintf( '<a href="%1$s" title="%2$s" rel="bookmark"><span class="entry-date">%3$s</span></a>',
	esc_attr( get_permalink() ),
	esc_attr( get_the_time() ),
	esc_attr( get_the_date() )
	),
	sprintf( '<span class="author vcard"><a class="url fn n" href="%1$s" title="%2$s">%3$s</a></span>',
	$alink,
	sprintf( esc_attr__( 'View all posts by %s', DR_TEXT_DOMAIN ), get_the_author() ),
	get_the_author()
	)
	);
}

/**