Customer support helped me fix this issue on my website (www.theeducons.com). No coding necessary! Follow these easy steps:
Go to "Pages" and navigate to your Home page under the "Main Navigation"
Then go to "Design"
Go to "Style Editor"
Scroll down to "Banner Section"
Under "Banner Text Color," select "Transparent" then save changes. It should look like a check mark once you have selected it.
You might have to adjust the size of the banner after you add a description. Google recommends using up to 160 characters. If you need to add more space in your banner, just keep pressing 'enter' under the Description field within the "Configure Page" until the banner gets large enough. It works the same way if you want to shrink the banner size, too.
I hope this helps!