Fatal error: Uncaught Error: Class 'Dotenv\Dotenv' not found in /var/www/html/protected/config/mu.php:16 Stack trace: #0 /var/www/html/protected/config/main.php(2): require_once() #1 /var/www/html/yii/framework/base/CApplication.php(133): require('/var/www/html/p...') #2 /var/www/html/yii/framework/YiiBase.php(125): CApplication->__construct('/var/www/html/p...') #3 /var/www/html/yii/framework/YiiBase.php(98): YiiBase::createApplication('CWebApplication', '/var/www/html/p...') #4 /var/www/html/index.php(16): YiiBase::createWebApplication('/var/www/html/p...') #5 {main} thrown in /var/www/html/protected/config/mu.php on line 16