Try removing these;
<li><span><?php _e('Expires:', 'appthemes') ?></span> <?php echo cp_timeleft(strtotime(get_post_meta($post->ID, 'expires', true))); ?></li>
Backup the file involved...
Try removing these;
<li><span><?php _e('Expires:', 'appthemes') ?></span> <?php echo cp_timeleft(strtotime(get_post_meta($post->ID, 'expires', true))); ?></li>
Backup the file involved...