Hello,
Unfortunately the error you're describing is within the Joomla core ; there is no information which could indicate that there is a problem in HikaShop and nothing which indicate if a patch is required to fix that issue.
Please check your plugins, activate temporally the Joomla debug mode and perform some tests.
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.