I was having a problem getting the fully activated Essential Grid (Not the one that comes with the theme). The theme itself was not allowing you to put in the purchase code. After talking with the support they gave me the following fix. I hope it helps if anyone runs into this problem.
You need to edit your functions.php and add the following:
//Enable Essential Grid Activation Area
if ( ! function_exists( ‘tp_essential_grid_theme_setup_fix’ ) ) :
function tp_essential_grid_theme_setup_fix() {
GLOBAL $EssentialAsTheme;
$EssentialAsTheme = false;
}
add_action( ‘admin_init’, ‘tp_essential_grid_theme_setup_fix’, 11 );
endif;