Fatal error: Uncaught Error: Class "mysqli" not found in /var/www/schemes/includes/classes/Database/db.php:13 Stack trace: #0 /var/www/schemes/vendor/composer/ClassLoader.php(444): include() #1 /var/www/schemes/vendor/composer/ClassLoader.php(322): Composer\Autoload\includeFile() #2 /var/www/schemes/includes/db_connect.php(6): Composer\Autoload\ClassLoader->loadClass() #3 /var/www/schemes/includes/global.php(5): include_once('...') #4 /var/www/schemes/index.php(3): include_once('...') #5 {main} thrown in /var/www/schemes/includes/classes/Database/db.php on line 13