Hello, @Denys,
Thanks for the login details. Only content that you place in Private content is visible to the support staff only.
I have checked your site now and found you have not created a default header using Header Builder. In order to solve your issue please watch this video and follow the instructions: https://www.youtube.com/watch?v=RbdKjQrFnO4&list=PLMqMSqDgPNmDu3kYqh-SAsfUqutW3ohlG&index=3
Regards 8Themes Team.