Mengatasi Error session_start() pada joomla

pada joomla biasanya banyak di temukan error ketika web di akses misal error pada session_start() berikut :

Warning: session_start() [function.session-start]: Cannot send session cookie – headers already sent by (output started at /Applications/XAMPP/xamppfiles/htdocs/joomla15/configuration.php:68) in /Applications/XAMPP/xamppfiles/htdocs/joomla15/libraries/joomla/session/session.php on line 423

Warning: session_start() [function.session-start]: Cannot send session cache limiter – headers already sent (output started at /Applications/XAMPP/xamppfiles/htdocs/joomla15/configuration.php:68) in /Applications/XAMPP/xamppfiles/htdocs/joomla15/libraries/joomla/session/session.php on line 423

Warning: Cannot modify header information – headers already sent by (output started at /Applications/XAMPP/xamppfiles/htdocs/joomla15/configuration.php:68) in /Applications/XAMPP/xamppfiles/htdocs/joomla15/libraries/joomla/session/session.php on line 426

Solusinya :
cek di file configuration.php di filemanager / di document nya , kemudian buka file tersebut.
Error tersebut dikarenakan ada space / line breaks setelah coding penutup php atau ?>
jika sudah ketemu tinggal di hapus space / line breaks tersebut.