Hello,
Because it’s empty http://prntscr.com/w0q60o
Customizer works https://gyazo.com/e2fcccae006a4ea2cb0c6c5f2bb31ca1
I see that you use the CDN. I suppose you did not create the CDN cache because it does not load the theme options styles.
So, login to your account and clear the cache http://prntscr.com/w0q8rx
Regards