Sidebar widgets not showing up

Hi, I was told by a live support staff that a Directory plugin, default theme should have sidebar widget. If you check my screeenshot, you will see it's not the case.

Can anyone help me get that sidebar widget enabled?
I was advised to put the <?php get_sidebar(); ?> above the <?php get_footer(); ?> "in the templates you want to add it into"
I tried that in the main template page (index.php) but it's not helping.