Here is an Idea... FIX YOUR HARDWARE AND SOFTWARE
I've been getting 502 Bad Gateway Errors these errors for well over a year doing labs on cognitiveclass.ai and now through Coursera. You think someone would have fixed it by now - especially given the number of people enrolled in the various data science classes offered.
文軒 孫 commented
I have to agree. I can't believe the site was under maintenance for so long, and even after the maintenance, "my data" is unavailable. This is telling me IBM can't even manage their own programs. Why did I trust them in charging me for a data science course?