Fatal error on WordPress <5.2

Please add this shim to your functions.php to make this theme available on older sites. Otherwise there will be a fatal error after updating.

if ( ! function_exists( 'wp_body_open' ) ) {

	/**
	 * Shim for wp_body_open, ensuring backwards compatibility with versions of WordPress older than 5.2.
	 */
	function wp_body_open() {
		do_action( 'wp_body_open' );
	}
}

Thanks in advance!

All the best
Torsten