Hello,
We are sorry to say that your request does not cover the item support.
Please learn more about the Envato Market (themeforest) item support policy (item support includes & not includes), here https://themeforest.net/page/item_support_policy
However, it can be any plugin conflicting issue. You can try to deactivate plugins one by one to check the issue.
Best Regards,
ThemeLooks Support Team