yii\base\ErrorException: Undefined variable: tag in /var/www/example.com/basic/views/partials/sidebar.php:51
Stack trace:
#0 /var/www/example.com/basic/views/partials/sidebar.php(51): yii\base\ErrorHandler->handleError(8, 'Undefined varia...', '/var/www/exampl...', 51, Array)
#1 /var/www/example.com/basic/vendor/yiisoft/yii2/base/View.php(348): require('/var/www/exampl...')
#2 /var/www/example.com/basic/vendor/yiisoft/yii2/base/View.php(257): yii\base\View->renderPhpFile('/var/www/exampl...', Array)
#3 /var/www/example.com/basic/vendor/yiisoft/yii2/base/View.php(156): yii\base\View->renderFile('/var/www/exampl...', Array, NULL)
#4 /var/www/example.com/basic/views/site/index.php(62): yii\base\View->render('/partials/sideb...', Array)
#5 /var/www/example.com/basic/vendor/yiisoft/yii2/base/View.php(348): require('/var/www/exampl...')
#6 /var/www/example.com/basic/vendor/yiisoft/yii2/base/View.php(257): yii\base\View->renderPhpFile('/var/www/exampl...', Array)
#7 /var/www/example.com/basic/vendor/yiisoft/yii2/base/View.php(156): yii\base\View->renderFile('/var/www/exampl...', Array, Object(app\controllers\SiteController))
#8 /var/www/example.com/basic/vendor/yiisoft/yii2/base/Controller.php(384): yii\base\View->render('index', Array, Object(app\controllers\SiteController))
#9 /var/www/example.com/basic/controllers/SiteController.php(118): yii\base\Controller->render('index', Array)
#10 [internal function]: app\controllers\SiteController->actionIndex()
#11 /var/www/example.com/basic/vendor/yiisoft/yii2/base/InlineAction.php(57): call_user_func_array(Array, Array)
#12 /var/www/example.com/basic/vendor/yiisoft/yii2/base/Controller.php(157): yii\base\InlineAction->runWithParams(Array)
#13 /var/www/example.com/basic/vendor/yiisoft/yii2/base/Module.php(528): yii\base\Controller->runAction('', Array)
#14 /var/www/example.com/basic/vendor/yiisoft/yii2/web/Application.php(103): yii\base\Module->runAction('', Array)
#15 /var/www/example.com/basic/vendor/yiisoft/yii2/base/Application.php(386): yii\web\Application->handleRequest(Object(yii\web\Request))
#16 /var/www/example.com/basic/web/index.php(12): yii\base\Application->run()
#17 {main}