Not merging/minify

Hi Guys,

I believe I followed all steps but the plugin is not merging JS files.

Enquere scripts:

/*
 * Add javascript
 *
 */

function tabs_theme_javascript() {

	// add plugins and libraries

	wp_deregister_script( 'wp-embed' );

	wp_deregister_script( 'jquery' );

	wp_register_script( 'jquery', get_template_directory_uri() . '/src/js/vendor/jquery-2.2.4.js', array(), VERSION, true );
	wp_register_script( 'cycle2', get_template_directory_uri() . '/src/js/vendor/jquery.cycle2-2.1.6.js', array(), VERSION, true );
	wp_register_script( 'reveal', get_template_directory_uri() . '/src/js/vendor/scrollreveal.min.js', array(), VERSION, true );

	wp_register_script( 'app', get_template_directory_uri() . '/dist/app.js', array(), VERSION, true );

	wp_localize_script( 'app', 'ajax_object', array( 'ajaxurl' => admin_url( 'admin-ajax.php' ) ), VERSION, true );

	wp_enqueue_script( 'jquery' );
	wp_enqueue_script( 'cycle2' );
	wp_enqueue_script( 'reveal' );
	wp_enqueue_script( 'app' );

}

add_action( 'wp_enqueue_scripts', 'tabs_theme_javascript' );

Tried clearing the cache, not results. All options on JS are unchecked. What could be the issue? Java/Exec/YUI not available on the server.

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