I'm unable to open Jupyter notebook. I keep getting this page and it never opens.

Hi, I can not access labs for Deep Neural Networks with PyTorch, It is showing "500 Internal Server Error". :(

I am unable to complete my course because jupyter notebooks lab is not working from the past few days and I am getting error 502 bad gate way. Please solve this issue as soon as possible.
'' https://labs.cognitiveclass.ai/login/lti '' this url is not even processing & showing error.

It was working fine till 2/25/2020

I can no longer access Courser JupyterLab: https://labs.cognitiveclass.ai/tools/jupyterlab/lab/tree/labs/DL0321EN/DL0321EN-2-1-Data-Preparation-py-v1.0.ipynb for the course https://www.coursera.org/learn/ai-deep-learning-capstone/home/welcome.
The error I receive is
"502 Bad Gateway
The server returned an invalid or incomplete response."

When I tried to enter the practice lab, it said '422 unprocessabel entity'.

How to fix it?

There is an error message:
File Load Error for PY0101EN-3-3-Functions.ipynb
Unreadable Notebook: /resources/labs/PY0101EN/PY0101EN-3-3-Functions.ipynb NotJSONError("Notebook does not appear to be JSON: 'Stack trace:\n#0 /var/www/polr/vendor/m...")

I would like to open a discussion about the working materials in the Jupyter Notebook labs. About the quality, the positive or negative remarks. Also, about some parts that are a bit unexplained or can be done differently. In other words, my idea is to post some feedbacks about the Jupyter Notebook labs.

this service is constantly giving me Service Connection Error to Jupyter server. Error dialogue popping up every few seconds. annoying

Just make the basic tool work when you click on it. For three days in a row I get "Application Not Responding"

IF

1. This service is being paid for


2. Your Jupyter Notebooks service is often down


3. The course is paid for on a monthly basis (Time = Money)

THEN

You should provide the .ipynb files for student to store on their own device to complete lab sessions

ELSE

Respond to user queries/ Get it fixed quick

AND

Refund everyone for the time the service is down/intermittent.

OR

Provide the service at no cost.

is there a timeline to resolve the issue

I'm getting below error:
!conda -- version

/bin/sh: 1: conda: not found

This used to work. What is missing?
Please provide exact fix steps as I'm a real newbie.

I follow the knowledge base suggestion to install Ta-lib: !conda install -c quantopian ta-lib --yes

However, I encountered the following error messages.

Solving environment: failed

UnsatisfiableError: The following specifications were found to be in conflict:
- scikit-learn==0.20.1
- ta-lib
- tensorflow==1.8.0
Use "conda info <package>" to see the dependencies for each package.

Can you tell me how to solve this problem?

Thank you

Hi there,

After clicking JupyterLab link.
Starting Docker Container message is displayed. And then Blank screen is displayed. PSA

Please guide to start JupyterLab and start using Jupyter Notebooks.

Thanks in advance.

select FNAME , LNAME
from EMPLOYEES

Hi,
Since yesterday after running a few commands I am getting 502 bad gateway error again & again and not able to connect to the jupyterLab now. Stuck with my project, please suggest....!!

Dear help desk,

I am facing alot of issues while working on jupyter notebooks, after running a few commands the ui is stuck which forces the user to referesh the screen and the same thing happens after executing a few commands.

This issue applies to R Studio, Zeeplin notebooks as well