Not working with custom post types

Hi @hemant-ahir,

I saw you posted 9 Months ago about the custom post types not working and you got it working. Can you please help me

I enabled custom post types in the settings,
I get the following error: Fatal error: Call to undefined function get_favorites_button() on the frontend

 </div>
   </li>
    <?php echo get_favorites_button($post->ID, $site_id); 
    the_favorites_button($post_id, $site_id)
    ?>
   <li 

I think I might have a syntax error but I dont know where to look at it asI am a newb to php development in wordpress

Thanks