Your Highend theme license is either missing or invalid

Hello,

I am trying to update the WPBakery (formerly Visual Composer) plugin for Highend Theme and WordPress says “Your Highend theme license is either missing or invalid.” The Visual Composer panel says “Invalid License” in red letters.

When I click “Find My License” (https://documentation.hb-themes.com/highend-child/#find-my-license) I get a 404 error.

Can you please help me find my license? Thanks!