WARNING(2): "mysqli_connect(): Headers and client library minor version mismatch. Headers:50553 Library:50640"

WARNING(2): "session_start(): Cannot send session cookie - headers already sent by (output started at /var/www/web173/html/gambio/gm/classes/ErrorHandler.php:419)"

WARNING(2): "session_start(): Cannot send session cache limiter - headers already sent (output started at /var/www/web173/html/gambio/gm/classes/ErrorHandler.php:419)"

WARNING(2): "mysqli::real_connect(): Headers and client library minor version mismatch. Headers:50553 Library:50640"

WARNING(2): "Cannot modify header information - headers already sent by (output started at /var/www/web173/html/gambio/gm/classes/ErrorHandler.php:419)"

WARNING(2): "Cannot modify header information - headers already sent by (output started at /var/www/web173/html/gambio/gm/classes/ErrorHandler.php:419)"

WARNING(2): "Cannot modify header information - headers already sent by (output started at /var/www/web173/html/gambio/gm/classes/ErrorHandler.php:419)"