PDOException: SQLSTATE[HY000] [2002] Can't connect to local server through socket '/var/lib/mysql/mysql.sock' (2)

#0 /home/cwjqgaju/domains/test.cloudforge-aje.com/public_html/cloudforge-academy/app/Services/Database.php(25): PDO->__construct()
#1 /home/cwjqgaju/domains/test.cloudforge-aje.com/public_html/cloudforge-academy/app/Services/Database.php(45): App\Services\Database::getInstance()
#2 /home/cwjqgaju/domains/test.cloudforge-aje.com/public_html/cloudforge-academy/app/Services/Database.php(52): App\Services\Database::query()
#3 /home/cwjqgaju/domains/test.cloudforge-aje.com/public_html/cloudforge-academy/app/Controllers/CoursesController.php(107): App\Services\Database::fetchOne()
#4 /home/cwjqgaju/domains/test.cloudforge-aje.com/public_html/index.php(122): App\Controllers\CoursesController->show()
#5 {main}