Unable to access JupyterLab
I tried to access JupyterLab yet I received an error message which says "jupyterlab-1.labs.cognitiveclass.ai’s server IP address could not be found.".
I'm using it while practicing for a Coursera course and for some reason I get nothing expect this error message and the same goes for "zeppelin notebook" and "Rstudio IDE". How can I fix it?
Attached to this support request a screenshot for my screen while trying to access JupyterLab.
Thanks in advance.