I have exactly the same problem and I think they’re an issue with the site.
I am login with my account and I have unlocked the SVG illustration option and every time I try to download the illustration, only change the button text from Download illustration to loading and nothing happens. So I just open the Developer tools for chrome and I see that there is an error with backend “the API”
basically, that error is saying that I do not have permission to download the illustration.
But I am logged into my account and I have updated my account by paying the monthly subscription.