'Missing Stylesheet' error on install of theme

No it's not broken, but this is a common error.

WordPress displays this error message generally when you have uploaded the wrong file.

We recommend you download the full package file from your download area at ThemeForest, not just the installable file, as it contains your photoshop files, XML import data, help files and much more.

Download the full package, unzip and grab a coffee with the instructional help file and follow the steps.