Fatal error: Uncaught CDbException: CDbConnection failed to open the DB connection. in /var/www/html/simpel-deployment/app/lib/vendor/yiisoft/yii/framework/db/CDbConnection.php:405 Stack trace: #0 /var/www/html/simpel-deployment/app/lib/vendor/yiisoft/yii/framework/db/CDbConnection.php(347): CDbConnection->open() #1 /var/www/html/simpel-deployment/app/lib/vendor/yiisoft/yii/framework/db/CDbConnection.php(325): CDbConnection->setActive(true) #2 /var/www/html/simpel-deployment/app/lib/vendor/yiisoft/yii/framework/base/CModule.php(394): CDbConnection->init() #3 /var/www/html/simpel-deployment/app/lib/vendor/yiisoft/yii/framework/logging/CDbLogRoute.php(109): CModule->getComponent('db') #4 /var/www/html/simpel-deployment/app/lib/vendor/yiisoft/yii/framework/logging/CDbLogRoute.php(71): CDbLogRoute->getDbConnection() #5 /var/www/html/simpel-deployment/app/lib/vendor/yiisoft/yii/framework/logging/CLogRouter.php(66): CDbLogRoute->init() #6 /var/www/html/simpel-deployment/app/lib/vendor/yiisoft/yii/framework/base/CModule.php(394) in /var/www/html/simpel-deployment/app/lib/vendor/yiisoft/yii/framework/db/CDbConnection.php on line 405