Hello Emanuele

Thank you for your purchase.

Issues like this usually occur when you paste the wrong credentials in the PayPal settings. Have you followed our documentation, where you can see what needs to be copied?

Hello Emanuele

Of course, but I don't know what that means exactly. I just tested our sandbox data in our development website, and it's working fine.

Please provide me a temporary WP-admin login for your site where this happens, so we could log in and take a look ‘from the inside’ as that’s the most efficient way to see and resolve the issue. We do not interfere with any data or anything else except for the plugin (in case that’s a production version of the site), and of course we do not provide login data to third party. 

You can write credentials here just check Private Reply so nobody can see them except us.

Hello Emanuele

Amelia doesn't use that command anywhere in the code, but some libraries we're using are calling that command, and that's not something we can change.

Unfortunately, there's nothing that can be done about this issue. I can only suggest changing the hosting provider, but I understand how troubling that may be.