Sensei - Set number of lessons to show per page on a Module archive page

module-archive-limit.php

<?php

function module_archive_limit( $query ) {
	if( is_tax( Sensei()->modules->taxonomy ) && $query->is_main_query() ) {
		// Set number of lessons per page
		$query->set( 'posts_per_page', 20 );
	}
}
add_action( 'pre_get_posts', 'module_archive_limit', 15, 1 );

?>

Add the code above to your theme's functions.php file (without the opening and closing <?php ?> tags) and adjust the value (20) to set the number of lessons per page on Module archive pages.