Could you be a little bit more specific. What is the error code? When do you get errors while saving? What type of spreadsheets are you uploading (Excel)?
Please go to config file (located in opengoo/config/config.php) and change this line
define('DEBUG', false);
to
define('DEBUG', true);
After this, share the contents of the file opengoo/cache/log.php with us.
Thanks,
Marcos