THEMECO Theme X - Stylesheet missing after update

I’ve just went in to my homepages after updating my wordpress plugins - now I get the error: “Stylesheet missing” when I try to enter my homepages.

When I login in to WP and go into the Theme settings I get this: “This Cornerstone license is ​not validated​. Fix.” message. But when I then go into, I see this:

So as fare as I can tell everything should be in order, so whats is wrong, and how do I fix it?

Plus should I go with the free pro upgrade?

Hi there,

Please try to revalidate the theme. You can find the steps here:

As for the conversion to Pro, please check here: