while ( $loop -> have_post() ) : $loop->the_post();
Your missing an s have_post()
should be have_posts();
Your title says retrieving meta-box and I am assuming you mean the post_meta. Which you use the get_post_meta() function.
while ( $loop -> have_post() ) : $loop->the_post();
Your missing an s have_post()
should be have_posts();
Your title says retrieving meta-box and I am assuming you mean the post_meta. Which you use the get_post_meta() function.