Clients see Error at the end of booking

Hi,

When a client reaches the last step of the booking process and clicks confirm booking, it just loads a page saying Error!

The booking actually goes through fine and they and we both are getting the confirmation email. Can you suggest what is wrong and also can I control what gets displayed after the booking confirmation / page redirects

?

Hi,
I will wait your site information from ticket system to check this issue.
Thanks
Dam

HAve the same on besilk.nl ( www.besilk.nl/index.php?option=com_osservicesbooking ),
got this error at the end. Mail is sent for reservation, but appointment does not show up in Gcalendar (think becaus of this error):
Fatal error: Access to undeclared static property: JLoader::$classes in /data/sites/web/besilknl/www/libraries/loader.php on line 195
:: OS Services Booking version 2.0
I've got no idea how to update too?

Hi Alex,
Please submit ticket and send super admin acc, ftp acc. I will check the issue for you
Thanks
Dam