Run Simply Static Pro with WP-Cron

functions.php

<?php

register_activation_hook( __FILE__, 'ssp_setup_static_export_cron' );

/**
 * Setup a cron job to run daily.
 *
 * @return void
 */
function ssp_setup_static_export_cron() {
	if ( ! wp_next_scheduled( 'ssp_static_export_cron' ) ) {
		wp_schedule_event( time(), 'daily', 'ssp_static_export_cron' );
	}
}

add_action( 'ssp_static_export_cron', 'ssp_run_static_export_cron' );
/**
 * Run different types of exports via Cron event.
 *
 * @return void
 */
function ssp_run_static_export_cron() {
	// Full static export
$simply_static = Simply_Static\Plugin::instance();
$simply_static->run_static_export();

// Exporting a build with Pro
update_option( 'simply-static-use-build', $build_id );
$simply_static = Simply_Static\Plugin::instance();
$simply_static->run_static_export();

// Exporting a single post/page with Pro
update_option( 'simply-static-use-single', $post_id );
$simply_static = Simply_Static\Plugin::instance();
$simply_static->run_static_export();
}