Warning: JInstaller::require_once(C:\xampp\htdocs\cristianbattista\libraries\joomla\installer\adapters\rsgtemplate.php) [function.JInstaller-require-once]: failed to open stream: No such file or directory in C:\xampp\htdocs\cristianbattista\libraries\joomla\installer\installer.php on line 217

Fatal error: JInstaller::require_once() [function.require]: Failed opening required 'C:\xampp\htdocs\cristianbattista\libraries\joomla\installer\adapters\rsgtemplate.php' (include_path='.;C:\xampp\php\pear\') in C:\xampp\htdocs\cristianbattista\libraries\joomla\installer\installer.php on line 217