Yeah i see the problem. In this case you need to update several theme file. You can follow the instruction below :
1. Go to replace this file /jkreativ-themes/template/additionalcss.php with this one https://pastebin.com/1pbTKdgf
2. Go to replace this file /jkreativ-themes/public/js/customizer/top-nav-customizer.js with this one https://pastebin.com/m2ZhRwx4
After that, please clear your browser cache. Let us know if you have further question.