public function notSupportedError() {
			if ( ! self::supportedVersion( 'wordpress' ) ) {
				echo '<div class="error"><p>' . sprintf( esc_html__( 'Sorry, The Events Calendar requires WordPress %s or higher. Please upgrade your WordPress install.', 'the-events-calendar' ), $this->min_wordpress ) . '</p></div>';
			}
			if ( ! self::supportedVersion( 'php' ) ) {
				echo '<div class="error"><p>' . sprintf( esc_html__( 'Sorry, The Events Calendar requires PHP %s or higher. Talk to your Web host about moving you to a newer version of PHP.', 'the-events-calendar' ), $this->min_php ) . '</p></div>';
			}
		}