0 Call to a member function getType() on null after PayPal Checkout payment

-- url of the page with the problem -- : www.petloc8.it/
-- HikaShop version -- : 6.5.0
-- Joomla version -- : 6.1.1
-- PHP version -- : 8.4
-- Browser(s) name and version -- : All
-- Error-message(debug-mod must be tuned on) -- : 0 Call to a member function getType() on null

Hi,
I've got 2 sites ( www.petloc8.it and www.mecs.org ) with the same error after PayPal checkout payment.
PayPal register the payment but, when the user is redirected to web site after payment, the page has the following error:
0 Call to a member function getType() on null
Thank you

Hi,

This error is linked to Joomla 6.1 changes.
We did modifications included in HikaShop 6.5.0 for this a few weeks ago.
However, any other extension or override might have a similar issue.
I don't think it is linked to PayPal.
The first thing to do is to activate the "debug" setting of the Joomla configuration and reproduce the issue.
You should see an error page with more information and that will allow us to tell you what to do.