Email links not working
If you find that none of the email links on ArtStation or on your ArtStation website are working, the problem is with your browser and not setting up a default email client. If you don't set up a default email client, no email links will work online - not on ArtStation, not anywhere.
ArtStation uses the universal HTML mailto tag that has existed practically since the internet began.
The tag looks like this:
With webmail becoming more popular, browsers sometimes don't get set up with a default mail application.
The solution for this is to set up an email client with your browser. Google "clicking mailto link nothing happens" to find solutions to your browser.