pagely purge path not working

cache.php

<?php
/**
 * Cache functions.
 */

namespace SLC;

use PagelyCachePurge;

/**
 * If we can, purge the path.
 *
 * @param string $path The path to purge.
 */
function purge_path( $path ) {
	if ( class_exists( 'PagelyCachePurge' ) ) {
		$pagely_cache_purge_instance = PagelyCachePurge::$instance;
		$pagely_cache_purge_instance->purgePath( $path );
	}
}

/**
 * Invalidate cache on the Deals Archive page when a new Deal is saved.
 */
function invalidate_deals_archive_cache() {
	if ( defined( 'DOING_AUTOSAVE' ) && DOING_AUTOSAVE ) {
		return;
	}
	purge_path( get_post_type_archive_link( 'deal' ) );
}
add_action( 'save_post_deal', __NAMESPACE__ . '\\invalidate_deals_archive_cache' );
add_action( 'update_option_deal_page', __NAMESPACE__ . '\\invalidate_deals_archive_cache' );