Logo no showing

Hi, the logo will scroll off screen because this theme is not designed to keep the logo on the screen at all times. You can see a demo here:
https://piquedemo.wordpress.com/

While we can’t provide in-depth support on this, you may be able to add your logo using some CSS along these lines:

@media screen and (min-width: 768px) {
	.main-navigation.sticky {
		background-image: url('https://yoursite.com/logo.png');
		background-size: 250px;
		background-repeat: no-repeat;
		background-position: 2em 50%;
		line-height: 2em;
	}
}

You’ll need to adjust the sizes to fit your menu and your logo. Hoping it helps!