Hello, Andrea,
Thank you for reaching out to us.
Please try to disable Ajax Add To Cart via Theme Options and check how it works then.
Note that we do not give a guarantee for full theme compatibility with all existing 3rd party plugins, and we can not provide support for such plugins. Sometimes, but not always, you need additionally customize the theme or plugin to make them work together. Unfortunately, it’s not possible for the author to make the theme compatible with all the existing plugins and additional customization is outside the scope of our basic support.
Best regards,
8Theme’s Team