Assign events tag to events using event submission form

/*
 * This snippet assign event tags with event using custom event submission form -> https://pastebin.com/Nvz4t6ca
 *
 * 1. create mu-plugins folder under wp-content/mu-plugins/function.php
 * 2. edit function.php and Save
 */
add_filter('em_event_save','custom_event_save',1,2);
function custom_event_save($result,$EM_Event){

	if ( !empty( $_REQUEST['event_tags'] ) ){
		wp_set_object_terms($EM_Event->post_id, $_REQUEST['event_tags'], EM_TAXONOMY_TAG);
	}

	return $result;
}