Fatal error: Uncaught Error: Class "yii\base\Widget" not found in /var/www/up.schoollogo.ru/vendor/yiisoft/yii2-debug/src/widgets/NavigationButton.php:18 Stack trace: #0 {main} thrown in /var/www/up.schoollogo.ru/vendor/yiisoft/yii2-debug/src/widgets/NavigationButton.php on line 18