Hello,
I'm using the last DT Register version on Joomla 3.9.25.
I'm testing it on a new site we are working on.
Actually I configured an event to have Paypal Express and Paypal PRO payment method in SANDBOX method.
Now when I'm on payment type page, I see the 2 payment method, I select Paypal Express and clicking on "Pay now" button, I'm getting a permission error (you can see the 2 screenshots.
Do you have any idea of the reason why? Consider I'm working on localhost... I don't know if it can create any problem....
Kind regards,
Matt