= 2 * HOUR_IN_SECONDS;
			}
		}

		set_site_transient( $this->cache_transient_name, $response, $cache_duration );

		return $response;
	}

	/**
	 * Delete WP Rocket update data cache.
	 *
	 * @since  3.3.6
	 * @access public
	 * @author Grégory Viguier
	 */
	public function delete_rocket_update_data_cache() {
		delete_site_transient( $this->cache_transient_name );
	}
}
<br />
<b>Fatal error</b>:  Uncaught Error: Call to a member function withArgument() on null in /home/payon/public_html/wp-content/plugins/wp-rocket/inc/classes/ServiceProvider/class-updater-subscribers.php:61
Stack trace:
#0 /home/payon/public_html/wp-content/plugins/wp-rocket/vendor/league/container/src/ServiceProvider/ServiceProviderAggregate.php(84): WP_Rocket\ServiceProvider\Updater_Subscribers-&gt;register()
#1 /home/payon/public_html/wp-content/plugins/wp-rocket/vendor/league/container/src/Container.php(88): League\Container\ServiceProvider\ServiceProviderAggregate-&gt;register('plugin_updater_...')
#2 /home/payon/public_html/wp-content/plugins/wp-rocket/inc/classes/class-plugin.php(186): League\Container\Container-&gt;get('plugin_updater_...')
#3 /home/payon/public_html/wp-content/plugins/wp-rocket/inc/main.php(40): WP_Rocket\Plugin-&gt;load()
#4 /home/payon/public_html/wp-includes/class-wp-hook.php(308): rocket_init('')
#5 /home/payon/public_html/wp-includes/class-wp-hook.php(332): WP_Hook-&gt;apply_filters(NULL, Array)
#6 /home/payon/public_ in <b>/home/payon/public_html/wp-content/plugins/wp-rocket/inc/classes/ServiceProvider/class-updater-subscribers.php</b> on line <b>61</b><br />