I understand the convenience of these tools being cloud-based, but they continually have connectivity issues or lag. There are massive disruptions and it's a huge hassle or it's very frustrating to lose work. The quality of the course suffers.

IBM Analytics exchange not showing up under skills network labs. Can someone help please?

r2_score first argument is the true value and the second one is the predicted value, so the code should be corrected.
Thanks

Need self service to resend the verification email.

Top-Down Approach to Problem Understanding

R, Jupyter, and Zeppelin notebooks are not connecting to their back end services.

It's taking a long time to load everything...

unable to login to access the cognitive class labs, it shows 500 internal server error

nvidia-smi -pm ENABLED -i 0;

Taking the data science classes by anybody unfamiliar with any of the basic programs used during this course makes no sense. It's monumentally frustrating trying to figure out the basics like this:
Exercise 3: (Jupyter notebook)
2. From the menu, click on "Insert", then "Insert Cell Above" or "Insert Cell Below".; While it's clear how to insure one or the cells, it's difficult to figure out how to enter the second now.
3. Note you can use the keyboard shortcuts: [a] - Insert a Cell Above; [b] - Insert a Cell Below. Really? What am I suppose to click on??????

Your user interface doesn't always make it clear that I am correct. Also adding print(xxxxx) to the answer when you're asking for output shouldn't be counted as wrong.

Add support for Julia language. Something like JuliaBox (online tool for Julia notebooks).

Hello, why my ambari page is loading infinetly (...Loading...).
have I to set some settings before using it?

https://ambari.datascientistworkbench.com/

Unable to access IBM Analytic Exchange
how to fix

It shows 404 Not Found: Requested route ('cdsx.au-syd.bluemix.net') does not exist.

Additionally, a progress bar would be nice to have and a feature to resume learning from where you left off.

Update Seahorse. The current version do not support Firefox browser on (L)Ubuntu 16.04 LTS.

I am getting a browser not supported message while trying to load Seahorse. Going through documentation of Seahorse, Firefox 49+ is supported. My browser version is 56.

So, please update current version of Seahorse.

Thanks for your efforts in putting together such a wonderful environment.

Hello, since last friday, when I want to start Zeppelin or RStudio or other notebooks from BigData Univ courses I receive 500 internal error,
I cleared browser cache, but it not helped,
can someone help me, pls?

The server returned an invalid or incomplete response or we also wait a long time