I was able to use it a week ago and now I cannot access it and this is the error message. I have not changed my location and my internet is still the same I used to be able to access.
The proxy server received an invalid response from an upstream server.
The proxy server could not handle the request GET /jupyter/user/armeros/git-pull .
Reason: Error reading from remote server
Could you please tell me what is going on and suggest me how to use it ? As stated in the lecture, I prefer to use this as the environment setup is more consistent with the lecture than Google Colab.