Query featured events

Hi. I am trying to query featured events on my homepage. Here is what my query looks like. When I add the ‘tax-query’ argument, the query doesn’t return anything. If I remove it, I get all the events. What’s wrong with my query ?

<?php
    $events = tribe_get_events( array(
	'tax_query' => array(
	    array(
		'taxonomy' => 'tribe_events_cat',
		'field' => 'slug',
		'terms' => 'featured',
		'operator' => 'IN'
	    ),
	),
	'posts_per_page' => -1
    ));
?>