Hi,
Please activate the debug mode in joomla in order to have the PHP error.
If you have a blank page it generally means that you have a PHP error which stop the rest of the page processing.
You can also check your PHP error log to have more details about the error.
Regards,
Jerome - Obsidev.com
HikaMarket & HikaSerial developer / HikaShop core dev team.
Also helping the HikaShop support team when having some time or couldn't sleep.
By the way, do not send me private message, use the "contact us" form instead.