Hi,
HikaShop 2.4.0 will be available in automatic updates when we will be sure that it fix all issues.
We just found one new issue with the popup and we are building a new HikaShop 2.4.0 package.
So if you just download HikaShop 2.4.0, please re-download it.
Sorry for the inconvenient.
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.