If I'm right, the Touchless Shutter app is free and so should be downloadable. Brian Smith's post gives some more information; apparently only works for Safari, Google Chrome or Internet Explorer. It does not work on the current and previous macOS (10.13 and 10.14, High Sierra and Mojave); Sony stuff doesn't play well with Apple OS's (firmware updates anyone? ).
If the problem is related to a specific country, you could try to use VPN to get it from another country.
Perhaps try downloading and installing the Tor Browser and use it to access the Sony website.
Tor Browser bounces you through numerous vpn points across the planet to hide you and keep your data secure from spying.
Thank you Ad and Will but it looks like the solution is to pay.
I tried to create an account but I was detected !
I do not know how to work with Tor Browser and programs like that.
It is stupid Portuguese and perhaps other nations, can't upload certain apps...