The Block Under Header

First - go to WPBakery Page Builder > Role Manager and under the user roles, choose the post type is Custom and check the post type you want to use the WPBakery Page Builder (nasa_block)
Step 1 - Go to Static Blocks Add New Block to create content
Step 2 - Navigate to Appearance Theme Options Header and Footer to enable The Block Under Header section
NOTE: If you are want to use Elementor plugin to build the Block Under Header, please view a guidepost here