Edit File: I18n.php
<?php namespace NinjaFileManager; defined('ABSPATH') || exit; /** * I18n Logic */ class I18n { protected static $instance = null; public static function getInstance() { if (null == self::$instance) { self::$instance = new self; } return self::$instance; } private function __construct() { add_action('plugins_loaded', array($this, 'loadPluginTextdomain')); } public function loadPluginTextdomain() { load_plugin_textdomain( NJT_FS_BN_DOMAIN, false, NJT_FS_BN_PLUGIN_URL . 'i18n/languages/' ); } }