Here is how I've been able to replicate the same "behavior" showed at Atlas "prove" video.
Take a closer look when the balance page starts to show, and "error" appears at the page top, this specific error ONLY triggers when the website could not establish a connection to the HitBTC socket (as anyone can see at the code) So to test it, I've developed this in 30 minutes:
Step 1) Edit computer network hosts and add:
127.0.1.1 st.hitbtc.com
This will prevent the website to find the socket to account info, so the error will appear at the top of the balance page, as we can see here: