after setting as a payment system Paypal Express configured with the required parameters, the payment process is not successful.
If payment is made by the button in the truck box, it opens the popup to access paypal and everything works properly.
If, however, the payment is made via the button on the last step of the checkout, you open the pop-up and after a small load you exit and reload the checkout page.
The configuration parameters are configured to be well seen that in the first case works.
Have you ever encountered this problem?
Thank you all.