Fatal error: Uncaught TypeError: mysqli_close(): Argument #1 ($mysql) must be of type mysqli, null given in /home/netupukroot/public_html/restaurants/backend/application/config/database.php:71 Stack trace: #0 /home/netupukroot/public_html/restaurants/backend/application/config/database.php(71): mysqli_close(NULL) #1 /home/netupukroot/public_html/restaurants/backend/application/config/database.php(129): getDatabaseConnectionDetails() #2 /home/netupukroot/public_html/restaurants/backend/system/database/DB.php(42): include('/home/netupukro...') #3 /home/netupukroot/public_html/restaurants/backend/system/core/Loader.php(347): DB('', NULL) #4 /home/netupukroot/public_html/restaurants/backend/system/core/Loader.php(1172): CI_Loader->database() #5 /home/netupukroot/public_html/restaurants/backend/system/core/Loader.php(153): CI_Loader->_ci_autoloader() #6 /home/netupukroot/public_html/restaurants/backend/system/core/Controller.php(52): CI_Loader->initialize() #7 /home/netupukroot/public_html/restaurants/backend/application/controllers/frontend.php(10): CI_Controller->__construct() #8 /home/netupukroot/public_html/restaurants/backend/system/core/CodeIgniter.php(314): Frontend->__construct() #9 /home/netupukroot/public_html/restaurants/backend/index.php(206): require_once('/home/netupukro...') #10 {main} thrown in /home/netupukroot/public_html/restaurants/backend/application/config/database.php on line 71