Hello,
I can’t log in your site. Please provide correct wp-admin access – http://prntscr.com/p89po8
Please check the changelog – https://xstore.8theme.com/update-history/ 6.0 version of the theme contains migration from old theme options (Redux Framework) to the new one – Kirki.
Make sure that you installed Kirki framework plugin; make sure that you updated not just theme but the Core plugin too; make sure that you finished migration of theme options (Go to Xstore > Theme Options after Kirki plugin installation).
Regards