Error to start Mailwatch : Class 'database' not found

The code in line 69 of the functions.php file indirectly uses the database class that comes from importing the database.php file.
The checkLangCode() function makes use of the audit_log() function, which requires the dbconn() function, which would only work with the database class already imported, but it is still called on line 103, causing the error "PHP Fatal error: Uncaught Error : Class 'database' not found in /var/www/html/mailscanner/functions.php"

The workaround is to move the database.php file import to the top (after conf.php import: line 41)

require_once __DIR__ . '/conf.php';
require_once __DIR__ . '/database.php';