Console keeps spinning on every lesson for Python

I am using Mac 10.11.6 with Safari and Chrome. On both browsers when I login and access the Python course, the console window just keeps spinning. I can click on the lessons and switch lessons but the right side console window keeps spinning regardless of the course that I try accessing.
I have cleared by history, cache, etc and restarted several times but it doesn’t seem to fix the issue. I checked further details and found that I am getting the following error:
Failed to load resource: net::ERR_INSECURE_RESPONSE