Hello, @Artur,
I am sorry but we are not responsible for any third-party Custom Code, and this is not necessary that if a third-party code works with any theme then it should have to work with our theme as well because all the themes have different coding standards and also different classes/functions and functionality as well.
Custom Code (Customization) is not included in the theme support policy and it is beyond our limitations.
Thanks for your understanding.
Regards 8Themes Team.