problem con prestashop 1.6.1.17 addon paypal 3.11.5

[gabbiano]

hi, I have a problem I have configured the official addon of paypal on prestashop.1.6.1.17 I go to the site https://shop.amarodelleterredelfalco.it and I checkout by clicking on payment with paypal (javascript: void (0)) sometimes it works but many times, many does not work and brings me on page 404 of my site. yesterday when on one of these occasions he took me to paypal .. I made a trial payment and it worked. and the sum was debited on my paypal business account. I would like to understand what happens? because so many times clicking to pay on paypal brings me on my site's 404 error page ... I think the configuration is right otherwise I would not have tried the purchase by crediting the amount to my account.
someone help me urgently

[MTS_Andre]

Hi, I ran a test on your website and I see that the issue is something on the module you are using. There is some page that is not found called by your module/integration. At the moment the error is returned we are not on PayPal at all. Here what I found:

Your integation try to call this HTML page module/paypal/ but this is not an HTML page and returns 404 - Not Found.

https://shop.amarodelleterredelfalco.it/module/paypal/

Check with the module, eventually re-install it or upgrade to a more recent version.