Envato Site Won't Allow Me To Checkout

I’m trying to check out with a WordPress theme in my cart. Every time I try to check out the website throws an error and then says “Could Not Complete Purchase” even though I have money in my account and have also tried checking out with a credit card.

Now it has put over $120 in my account and still won’t allow me to purchase the theme.

PLEASE ADVISE. Thank you.

Now its throwing up an Error 405 Not Allowed.

I think they are working on the site as we speak. (backend changes).
I have trouble getting on the site as well at the moment, and got a 405 error just now as well.

Only when I want to use the site huh? Always. Ha.