Visual composer isn't working anymore

Visual composer stopped working after upgrading Wordpress and it says “Please activate your copy of Visual Composer to receive automatic updates.”

I have bought it inside hotstar theme, please help. thank you

Visual Composer released an update to make it compatible with WP 4.5.x quite some time ago. Since you received your copy of Visual Composer through your theme, the theme author is required/supposed to provide you with the update, as you don’t own an actual license of Visual Composer.

So please check if there are any recent theme updates available, which should then also include the updated version of Visual Composer.