Hello,
Even if you are using the "guest checkout", you must have a "login" block in your checkout workflow to let the customer provide its email address and access to the other "blocks" which require an account (even if it's a guest one), like "address".
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.