Warning massage customers in cart backend

-- HikaShop version -- : 2.6.3
-- Joomla version -- : 3.5.1

Hello, today there was an error (see screen) when entering the admin section of the basket shoppers. What could it be? This message appears only when the buyer is not registered and added a product to the cart.

Site www.keks-store.ru

Hi,

Please note that on a live website, you're supposed to turn off the "error reporting" setting of the Joomla configuration for security reasons. So these shouldn't appear.
Could you provide the line of code you have on the line 410 of that file ?
In any case, it's nothing important and we'll have it fixed for the next version.

The fact that the error messages in the settings Joomla me off, and always have been disabled, and this message suddenly began to appear today.

line 410
I removed almost all of the basket and the message disappears. But removed through phpadmin since not all through the admin panel of the basket removed.

Thank you for the details. We'll fix that for the next version.