Foreign users registration problem

-- url of the page with the problem -- : www.edizionidanaus.com/nuovosito/catalog...nea-scientifica.html
-- HikaShop version -- : 4.4.0
-- Joomla version -- : 3.9.24
-- PHP version -- : 7.3.22
-- Browser(s) name and version -- : Firefox 85.0.1

Hello,
the store is in Italy, if a user (non-Italian) after his purchases chooses not to register and enters his data, in the next step they see some error lines that I attach in the image, this happens only for non-Italian users .
You can try to make a purchase and register to see the error, you must use a non-Italian address.
Can you help me?

Hi,

Download again the install package of the 4.4.0 Essential on our website and install it on yours again.
It will add a patch for these warnings and you should not have them anymore.

Dear Nicola,
thanks for your quick help, I installed the update all over again as you advised me, many lines are gone, and this is left:

Warning: Creating default object from empty value in /web/htdocs/www.edizionidanaus.com/home/nuovosito/administrator/components/com_hikashop/classes/currency.php on line 2459

THX

Hi,

Thank you for your feedback. I've added another patch on our end for this one.
Download again the install package of the 4.4.0 Essential on our website and install it on yours again.

Infinite thanks,
you were quick to detect the problem thanks again Nicolas !!!
You are the best!