Hello,

I have visited your website and there is no login to see prices displayed on products.

Screenshot for Clarification: https://gyazo.com/3e08ddfc49be86662a643da48fc4783a

For the header issues please Go to Theme Settings >> Performance and disable the Mobile DOM Optimization.

Screenshot for Clarification: https://gyazo.com/024144ce3f8e3dbcfc70c98ab78c4fa3

Then check back.

Regards.
XTemos Studio.