Fatal error: Uncaught TypeError: MyUtility::setSiteLanguage(): Argument #1 ($arr) must be of type array, null given, called in /var/www/html/application/controllers/MyAppController.php on line 190 and defined in /var/www/html/application/utilities/MyUtility.php:59 Stack trace: #0 /var/www/html/application/controllers/MyAppController.php(190): MyUtility::setSiteLanguage() #1 /var/www/html/application/controllers/MyAppController.php(35): MyAppController->setSiteLanguage() #2 /var/www/html/application/controllers/TeachersController.php(19): MyAppController->__construct() #3 /var/www/html/library/core/FatApplication.class.php(0): TeachersController->__construct() #4 /var/www/html/public/index.php(9): FatApplication->callHook() #5 {main} thrown in /var/www/html/application/utilities/MyUtility.php on line 59