模块不存在:certificate

 $config = self::init($module);

 // 模块请求缓存检查
 $request->cache(
 $config['request_cache'],
 $config['request_cache_expire'],
 $config['request_cache_except']
 );
 } else {
 throw new HttpException(404, 'module not exists:' . $module);
 }
 } else {
 // 单一模块部署
 $module = '';
 $request->module($module);
 }

 // 设置默认过滤机制
 $request->filter($config['default_filter']);