Added JS file shown in view page, but gives 404 error when clicked

After the following code has been created in the child theme’s function.php,

add_action('wp_enqueue_scripts', 'js_files');
function js_files() {
	wp_register_script('ajax_call_mkto', get_template_directory_uri() . 'js/something.js', array('jquery'), false);
	wp_enqueue_script('ajax_call_mkto');
}

I checked the view page source and clicked on the link to see if it works, after clicking it, it gives me a 404 Not Found page. Is there something wrong with my JS file?

var $k = jQuery.noConflict();

$k('#something .somethinghere("yolo")').click(function() {
	var $this = $k(this);

	// Ajax call
	ajaxConnection($this);
});

function ajaxConnection(item) {

	alert('IT WORKS!');

}

Thanks,
Halben