Don't add code when previewing in Customizer

includes/tracker.php

@@ -14,7 +14,7 @@
 function tptn_enqueue_scripts() {
 	global $post, $tptn_settings;
 
-	if ( is_singular() && 'draft' !== $post->post_status ) {
+	if ( is_singular() && 'draft' !== $post->post_status && ! is_customize_preview() ) {
 
 		$current_user = wp_get_current_user();	// Let's get the current user
 		$post_author = ( $current_user->ID === $post->post_author ) ? true : false;	// Is the current user the post author?

readme.txt

@@ -175,6 +175,8 @@ add_filter( 'manage_edit-projects_sortable_columns', 'tptn_column_register_sorta
 * Bug fixes:
 	* Attachments now work with the widget and elsewhere
 	* New tracker now works when jQuery is loaded in the footer
+	* Don't add tracker code when previewing in customizer
+	* Doesn't report an error if no author is assigned to a post
 
 * Deprecated:
 	* `tptn_add_tracker` and `tptn_add_viewed_count` have been deprecated. These should no longer be needed with the new tracker option.