theme does not work after update that was recommended by email from envato

After getting an email from envato about an update for my theme, I logged into my wordpress account and updated the theme. Now my theme does not work, I have this message

Broken Themes

The following themes are installed but incomplete.

depot Stylesheet is missing.

Does this mean that my design I had for my website before the update is deleted? I dont understand, I know very little about websites, any help would be great. Should I download the theme again and upload the stylesheet again?

Hello @jasondogan

You don’t keep backup before update?

Thanks :slight_smile: