Nested Loop Issues

I’m trying to write a loop that gets all users & if the user has posts, list the post titles. I’d also like to get a count of users.

Code:

<?php
$args = array(
	'orderby' => display_name
);
// The Query
$user_query = new WP_User_Query( $args );
$x = $total-users; //returns 0
echo '<p>Total users: ' . $x . '</p>';
// Loop
if ( ! empty( $user_query->results ) ) {
	echo '<p>Number of users: ' . count($user_query) . '</p>'; //returns 1
		foreach ( $user_query->results as $user ) {
			echo '<p>User name: ' . $user->first_name . '</p>';
			$args4 = array (
				'author_name' => $user->display_name,
				'orderby' => 'title'
			);
			//The Query
			$the_query4 = new WP_Query( $args4 );
			//The Loop
			if ( $the_query4->have_posts() ) {
				echo '<ul>';
				while ( $the_query4->have_posts() ) {
					$the_query4->the_post();
					echo '<li>' . get_the_title() . '</li>';
			}
			echo '</ul><br />';
			} else {
				echo '<p>No posts were found for ' . $user->display_name . '</p>';
			}
		}
} else {
	echo '<p>No users were found.</p>';
}
?>

Output:

Total users: 0

Number of users: 1

User name: Booyah

Booyah’s post

User name: Clea

String Theory

User name: Lezly

You Are Here
Using Time Travel to Manage Your Time
Politics 101
HAL
Candidates? What candidates?

User name: Zoe

No posts were found for Zoe Travertine

===========

Problem is, Zoe has five published posts, but my code isn’t getting those. What am I missing?