WARNING(2): "mysql_connect(): Headers and client library minor version mismatch. Headers:50568 Library:100148"

WARNING(2): "session_start(): Cannot send session cookie - headers already sent by (output started at /var/www/vhosts/koi-braun.de/shop/gm/classes/ErrorHandler.php:386)"

WARNING(2): "session_start(): Cannot send session cache limiter - headers already sent (output started at /var/www/vhosts/koi-braun.de/shop/gm/classes/ErrorHandler.php:386)"

WARNING(2): "Cannot modify header information - headers already sent by (output started at /var/www/vhosts/koi-braun.de/shop/gm/classes/ErrorHandler.php:386)"