Everything appears to be set up correctly in the Customizer. I cannot find any clue as to why the header is missing.

Everything appears to be set up correctly in the Customizer. I cannot find any clue as to why the header is missing.

Sure, I added it under the secure note section. Thanks!
Hi there,
It’s because of this custom CSS that you added 
.x-btn-widgetbar, .x-btn-navbar, .x-nav-wrap {
display: none !important;
}
Please remove it, thanks!
That worked! Thank you!
Glad we were able to help 