NEED HELP FAST!!! Error on checkout

-- HikaShop version -- : 3.6
-- Joomla version -- : 3.4

What in the world is this???

How can I get rid of this...I'm SURE customers are not checking out when they see this error!

By the way...this is a GUEST CHECKOUT....not a checkout from a user who has logged in

Hello Pam,
These are actually just notice messages which won't affect the your shop but that are showing due to the fact that your are proceeding to the checkout without being logged in.
Note that when your shop is in production mode you should :
- Disable the Joomla debug mode ("Administration->Global configuration->System->Debug System/Language")
- Set the "error reporting" option of the Joomla configuration to "none"

Ohhhhhhh...thank you!!!!

Thank you

Thank you

Pam