Hi,
If you have a blank page, the best is to activate temporally the debug mode or to change the "error reporting level" to "maximum" in your Joomla global configuration (tab "server").
At this moment you will see the PHP error message and thanks to it, we will be able to fix the problem.
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.