❌ Error: Undefined variable $url
📁 File: /var/www/apps/app-server-pack5/backend/views/express/author/index.php:114
⚡ Type: yii\base\ErrorException
🔍 Controller ID: GridView-widget
🔍 Layout ID: #express_author_index

🔍 Stack Trace:
#0 /var/www/apps/app-server-pack5/backend/views/express/author/index.php(114): yii\base\ErrorHandler->handleError()
#1 /var/www/vendor/yiisoft/yii2/base/View.php(348): require('...')
#2 /var/www/vendor/yiisoft/yii2/base/View.php(258): yii\base\View->renderPhpFile()
#3 /var/www/vendor/yiisoft/yii2/base/View.php(157): yii\base\View->renderFile()
#4 /var/www/vendor/yiisoft/yii2/base/Controller.php(413): yii\base\View->render()
#5 /var/www/apps/app-server-pack5/backend/controllers/express/AuthorController.php(99): yii\base\Controller->render()
#6 [internal function]: backend\controllers\express\AuthorController->actionIndex()
#7 /var/www/vendor/yiisoft/yii2/base/InlineAction.php(60): call_user_func_array()
#8 /var/www/vendor/yiisoft/yii2/base/Controller.php(184): yii\base\InlineAction->runWithParams()
#9 /var/www/vendor/yiisoft/yii2/base/Module.php(555): yii\base\Controller->runAction()
#10 /var/www/vendor/yiisoft/yii2/web/Application.php(103): yii\base\Module->runAction()
#11 /var/www/vendor/yiisoft/yii2/base/Application.php(387): yii\web\Application->handleRequest()
#12 /var/www/server_2/qwetru_ru/backend/web/index.php(17): yii\base\Application->run()
#13 {main}