Warning: mysqli::__construct(): (HY000/2002): Connection refused in /home/quattrobc/public_html/db.php on line 20

Fatal error: Uncaught Error: mysqli object is already closed in /home/quattrobc/public_html/db.php:21 Stack trace: #0 /home/quattrobc/public_html/db.php(21): mysqli->set_charset() #1 /home/quattrobc/public_html/startup.php(11): db->__construct() #2 /home/quattrobc/public_html/customer-detail.php(2): include('...') #3 {main} thrown in /home/quattrobc/public_html/db.php on line 21