Add this code into header.php of your child theme.
Please make all changes to the child theme files, and do not add the code directly to the theme files, otherwise after updating the theme your fixes will be lost
header.php
// Groovy Menu integration code. Place at the header.php.
if ( function_exists( 'groovy_menu' ) ) {
groovy_menu();
}
// salient-gm-child archive for Salient theme version 11+
Note: You can find the child theme for the Salient Theme in the
Groovy Menu > Integration section