Problem Registration after upgrade

-- url of the page with the problem -- : www.jetshop24.net
-- HikaShop version -- : 4.0.2
-- Joomla version -- : 3.9.2
-- PHP version -- : 7
-- Error-message(debug-mod must be tuned on) -- : Error on registration

Dear Team,

after updating to the 4.0.2 Hikashop the registration no longer works

Regards

That did it. Thanks