Kalium Theme Gets Error Message "Missing CSS Style Sheet"

Hi, I get the error that I am missing the css stylesheet for my “Kalium” theme when I tried to upload it. I checked on my site hosting account and WordPress is up to date on that end. What could be the problem? I don’t think I should have to pay an additional $41 to get Kalium support (it’s almost as much as I paid for the theme). If anyone can help with this I would so much appreciate an answer. Thanks in advance.

Never mind. I needed to upload only the zip file for the theme instead of all the files.