Exclude category(ies) from main event views

exclude-category.php

add_action( 'pre_get_posts', 'tribe_exclude_events_category' );
function tribe_exclude_events_category( $query ) {

	if ( ! is_singular( 'tribe_events' ) ) {

		if ( $query->query_vars['post_type'] == Tribe__Events__Main::POSTTYPE && ! is_tax( Tribe__Events__Main::TAXONOMY ) && empty( $query->query_vars['suppress_filters'] ) ) {

			$query->set( 'tax_query', array(

				array(
					'taxonomy' => Tribe__Events__Main::TAXONOMY,
					'field'    => 'slug',
					'terms'    => array( 'alberta' ),
					'operator' => 'NOT IN',
				),
			) );
		}
	}

	return $query;
}