Why does it give an error after clicking "Confirm order"?

Question

Joomla

Good afternoon!
There is Joomla 3.8, VirtueMart 3.4.6 and OnePageCheckout from Rupostel. All fields are filled, but after clicking on the "Confirm order" button, the following error occurs:

Too few arguments to function VirtueMartModelState::testStateCountry(), 2 passed in /home/a/algoritm12/zakazpechati.rf/public_html/components/com_onepage/overrides/cart_override.php on line 2364 and exactly 3 expected

On this line is:

if (!$msg = VirtueMartModelState::testStateCountry($cart->{$type}['virtuemart_country_id'], $cart->{$type}['virtuemart_state_id'])) {

Thank you in advance!

Answer 1

Update OnePageCheckout to the latest version. This error appears in their changelog, see screenshot