exception 'yii\base\InvalidParamException' with message 'The view file does not exist: /home/balance3/public_html/frontend/views/site/error.php' in /home/balance3/public_html/vendor/yiisoft/yii2/base/View.php:226
Stack trace:
#0 /home/balance3/public_html/vendor/yiisoft/yii2/base/View.php(149): yii\base\View->renderFile('/home/balance3/...', Array, Object(frontend\controllers\SiteController))
#1 /home/balance3/public_html/vendor/yiisoft/yii2/base/Controller.php(367): yii\base\View->render('error', Array, Object(frontend\controllers\SiteController))
#2 /home/balance3/public_html/vendor/yiisoft/yii2/web/ErrorAction.php(108): yii\base\Controller->render('error', Array)
#3 [internal function]: yii\web\ErrorAction->run()
#4 /home/balance3/public_html/vendor/yiisoft/yii2/base/Action.php(92): call_user_func_array(Array, Array)
#5 /home/balance3/public_html/vendor/yiisoft/yii2/base/Controller.php(151): yii\base\Action->runWithParams(Array)
#6 /home/balance3/public_html/vendor/yiisoft/yii2/base/Module.php(455): yii\base\Controller->runAction('error', Array)
#7 /home/balance3/public_html/vendor/yiisoft/yii2/web/ErrorHandler.php(80): yii\base\Module->runAction('site/error')
#8 /home/balance3/public_html/vendor/yiisoft/yii2/base/ErrorHandler.php(95): yii\web\ErrorHandler->renderException(Object(yii\web\NotFoundHttpException))
#9 [internal function]: yii\base\ErrorHandler->handleException(Object(yii\web\NotFoundHttpException))
#10 {main}
Previous exception:
exception 'yii\base\InvalidRouteException' with message 'Unable to resolve the request "a".' in /home/balance3/public_html/vendor/yiisoft/yii2/base/Module.php:461
Stack trace:
#0 /home/balance3/public_html/vendor/yiisoft/yii2/web/Application.php(83): yii\base\Module->runAction('a', Array)
#1 /home/balance3/public_html/vendor/yiisoft/yii2/base/Application.php(375): yii\web\Application->handleRequest(Object(yii\web\Request))
#2 /home/balance3/public_html/index.php(20): yii\base\Application->run()
#3 {main}

Next exception 'yii\web\NotFoundHttpException' with message 'Unable to resolve the request "a".' in /home/balance3/public_html/vendor/yiisoft/yii2/web/Application.php:95
Stack trace:
#0 /home/balance3/public_html/vendor/yiisoft/yii2/base/Application.php(375): yii\web\Application->handleRequest(Object(yii\web\Request))
#1 /home/balance3/public_html/index.php(20): yii\base\Application->run()
#2 {main}