Fatal error: Uncaught Error: Non-static method DatabaseHandler::getInstance() cannot be called statically in /var/www/vhosts/thermobag.com/webspace/httpdocs/thermobag.com/inc/config.php:27
Stack trace:
#0 /var/www/vhosts/thermobag.com/webspace/httpdocs/thermobag.com/index.php(5): require_once()
#1 {main}
  thrown in /var/www/vhosts/thermobag.com/webspace/httpdocs/thermobag.com/inc/config.php on line 27