Fatal Error
Uncaught Error: mysqli object is already closed in system/library/db/mysqli.php:15

Stack trace:
#0 system/library/db.php(14): DB\MySQLi->__construct()
#1 system/framework.php(68): DB->__construct()
#2 system/startup.php(140): require_once('...')
#3 index.php(14): initialize()
#4 {main}
thrown in system/library/db/mysqli.php on line 15