SQLSTATE[HY000] [1044] Access denied for user 'offergop_deva'@'localhost' to database 'offergop_axd'

Fatal error: Uncaught Error: Call to a member function query() on null in /home/offergopk/public_html/assets/header.php:203 Stack trace: #0 /home/offergopk/public_html/index.php(3): include() #1 {main} thrown in /home/offergopk/public_html/assets/header.php on line 203