vs code jupyter extension not loading

After the latest update of VSCode, I can't run Jupyter notebooks anymore

stackoverflow.com › questions › 75377472 › after-the-latest-update-of-vscode-i-cant-run-jupyter-notebooks-anymore

I ran into this too. I was able to work around it by switching the Jupyter extension to the pre-release version (which was a suggestion in a different question that I can't find anymore).

Answer from Alex Trzyna on Stack Overflow

Stack Overflow

stackoverflow.com › questions › 75377472 › after-the-latest-update-of-vscode-i-cant-run-jupyter-notebooks-anymore

visual studio code - After the latest update of VSCode, I can't run Jupyter notebooks anymore - Stack Overflow

Top answer

1 of 2

I ran into this too. I was able to work around it by switching the Jupyter extension to the pre-release version (which was a suggestion in a different question that I can't find anymore).

2 of 2

solved downgrading to previous version (November 2022) then updating to latest version again. Running same Python and Jupyter version. Good luck

GitHub

github.com › microsoft › vscode-jupyter › issues › 7352

Jupyter notebook stuck loading, not showing content, in VSCode · Issue #7352 · microsoft/vscode-jupyter

August 31, 2021 - Jupyter notebook stuck loading, not showing content, in VSCode#7352 · Copy link · Assignees · Labels · bugIssue identified by VS Code Team member as probable bugIssue identified by VS Code Team member as probable buginfo-neededIssue requires more information from posterIssue requires more information from poster · Dervis-vL · opened · on Aug 31, 2021 · Issue body actions · VS Code version: 1.59.1 · Jupyter Extension version (available under the Extensions sidebar): v2021.8.1236758218 ·

Author Dervis-vL

Discussions

VS Code doesn't load any jupyter notebook file

VSCode Version: 1.49 x64 OS Version: Ubuntu 20.04 Python: 3.8.3 conda 4.8.3 Steps to Reproduce: Open VS Code Open any .ipynb file Does this issue occur when all extensions are disabled?: Yes More on github.com

github.com

September 12, 2020

python - Jupyter notebook not opening in VS Code - Stack Overflow

Unable to determine version of ... DLL load failed: The specified module could not be found. I have installed all the plugins which were necessary, ran various commands, I also updated the notebook. conda install notebook · I am using: anaconda 3 vs code 1.26.1 windows 10 I cant start new notebooks or use an existing one either. Please help, and let me know if any more information is required. ... Check the required extensions installed in vscode. install jupyter and ipython ... More on stackoverflow.com

stackoverflow.com

VS Code select Existing Jupyter Server stopped working

Environment data VS Code version: 1.79 Jupyter Extension version (available under the Extensions sidebar): v2023.5.1001582324 Python Extension version (available under the Extensions sidebar): v202... More on github.com

github.com

June 14, 2023

I am installing the jupyter extension on my VsCode and its failing with a Vscode version error.

Environment data VS Code version: 1.85.2 Jupyter Extension version (available under the Extensions sidebar): v2024.1.0 Python Extension version (available under the Extensions sidebar): v2023.22.1 ... More on github.com

github.com

January 31, 2024

reddit.com › r/vscode › jupyter extension not working

r/vscode on Reddit: Jupyter Extension not working

January 25, 2022 -

Whenever I start a new jupyter notebook(a .ipynb) file. this error shows up. And then I am unable to get the jupyter options(like Run Cell etc) the jupyter notebook on browser.

Error which I see after toggling Developer mode.

Please help!

Top answer

1 of 4

Looks like an internal bug, you should file an issue

2 of 4

Does the Jupyter extension work on Code OSS ? Isn’t it a proprietary Microsoft extension?

Visual Studio Code

code.visualstudio.com › docs › datascience › jupyter-notebooks

Jupyter Notebooks in VS Code

November 3, 2021 - Jupyter (formerly IPython Notebook) is an open-source project that lets you easily combine Markdown text and executable Python source code on one canvas called a notebook. Visual Studio Code supports working with Jupyter Notebooks natively (through the Jupyter extension), and through Python ...

GitHub

github.com › microsoft › vscode › issues › 106526

VS Code doesn't load any jupyter notebook file · Issue #106526 · microsoft/vscode

September 12, 2020 - VS Code doesn't load any jupyter notebook file#106526 · Copy link · Assignees · HenriqueAJNB · opened · on Sep 12, 2020 · Issue body actions · VSCode Version: 1.49 x64 · OS Version: Ubuntu 20.04 · Python: 3.8.3 · conda 4.8.3 · Steps to Reproduce: Open VS Code · Open any .ipynb file · Does this issue occur when all extensions are disabled?: Yes ·

Author HenriqueAJNB

Stack Overflow

stackoverflow.com › questions › 53802768 › jupyter-notebook-not-opening-in-vs-code

python - Jupyter notebook not opening in VS Code - Stack Overflow

Top answer

1 of 3

Check the required extensions installed in vscode.
install jupyter and ipython packages in your python venv using pip:
```
 pip install jupyter
 pip install ipython
```
If its still not working try to change the python kernal in the top right corner of ipynb notebook.

2 of 3

This is due to running jupyter without first activating the environment for Python 3.7. This was fixed in the 2018.12.0 release of the extension.

GitHub

github.com › microsoft › vscode-jupyter › issues › 13699

VS Code select Existing Jupyter Server stopped working · Issue #13699 · microsoft/vscode-jupyter

June 14, 2023 - To do so, I'd use Jupyter: Create Interactive Window, then click on the kernel select, do Select Another Kernel, then Existing Jupyter Server, at which point i'd enter the URI and token of the server. At that point it would show me the available Python kernel to select and I'd click it. After typing in the URI of the server, I either just get to the window that says 'Select Kernel' and the little blue processing bar bounces back and forth until it times out, or I see a screenshot like the one attached below which directs me to check the connecting from vs code dev link and shows that the error is ENETUNREACH, which I can't interpret.

Author TekeDado

GitHub

github.com › microsoft › vscode-jupyter › issues › 15101

I am installing the jupyter extension on my VsCode and its failing with a Vscode version error. · Issue #15101 · microsoft/vscode-jupyter

January 31, 2024 - bugIssue identified by VS Code Team member as probable bugIssue identified by VS Code Team member as probable bug ... Unable to install extension 'ms-toolsai.jupyter' as it is not compatible with VS Code '1.85.2'.

Author 4qmbjamil

Find elsewhere

Google Bing Mojeek

reddit.com › r/vscode › jupyter not loading

r/vscode on Reddit: Jupyter not loading

September 11, 2021 -

Hi,

I have a Jupyter notebook file that VS Code is not loading. An option on the top right came to select the kernel from the marketplace, which I installed then its not working and get an error, below is the process.

select kernel from marketplace (Jupyter by Microsoft)
get an error: "Extension activation failed, run 'DeveloperL Toggle Developer Tools' command for more information

Edit: Also installed the python extension and the file is stuck in the loading stage. For test reason as well, I created a random `.ipynb` and I couldn't run any python code but the cells were present.

I have 2 kernels locally on my linux (python 2 and 3), that work fine from Jupyter. I looked online by couldn't find any fix to this, any help is appreciated, thank you!

Top answer

1 of 5

Did you install the Jupyter extension?

2 of 5

Please delete data folders to reset VS Code, then install needed extension and try again:

Linux - Delete $HOME/.config/Code and ~/.vscode

GitHub

github.com › microsoft › vscode-jupyter › issues › 14040

Jupyter does not detect python extension · Issue #14040 · microsoft/vscode-jupyter

August 2, 2023 - Visual Studio Code (1.80.0, undefined, desktop) Jupyter Extension Version: 2023.6.1101941928. Python Extension not installed. Platform: win32 (x64).

Author AntonBogun

GitHub

github.com › microsoft › vscode-jupyter › issues › 13495

Unable to install Jupyter extension within vscode · Issue #13495 · microsoft/vscode-jupyter

May 12, 2023 - bugIssue identified by VS Code Team member as probable bugIssue identified by VS Code Team member as probable bug ... I'm unable to successfully install the extensions onto my vscode version. Initially when I try to install I get the error: Failed to install ms-toolsai.jupyter.

Published May 12, 2023

Author entgraceades

Stack Overflow

stackoverflow.com › questions › 66544398 › vscode-unable-to-install-jupyter-python-extension

visual studio code - VSCode unable to install Jupyter / Python Extension - Stack Overflow

Top answer

1 of 2

OS: Manjaro KDE

I tried installing code and upgrading to insiders (AUR) using pacman and did not get Python to install in vscode because of the Jupyter error. I tried installing Jupyter vsix manually and this also failed.

I ended up getting Python in to vscode by installing code using snap. https://snapcraft.io/code

2 of 2

If python/other extension on VS Code is unable to be installed, then:

You should uninstall VS code first, then clear the temp and prefetch file.
After that, go to C:\Users\<username>\AppData\Roaming and delete Code folder there.
Now Restart your PC and install VS Code Again.

Thats It. Done.

Python.org

discuss.python.org › python help

Setting up and integrating Jupyter Notebook development environment with VSC - Python Help - Discussions on Python.org

August 17, 2022 - Hello Pythonistas! I am trying to set up the Jupyter Notebook extension for VSCode but I can’t get my code snippets to run. If you check out this YouTube clip at exactly 1 minute and 46 seconds (here - - you can pause …

reddit.com › r/vscode › jupyter extension activation failed can't run any notebook cells. helpp

r/vscode on Reddit: Jupyter Extension Activation Failed Can't Run Any Notebook Cells. HELPP

October 9, 2025 -

Hey everyone,

I'm running into a persistent issue with the Jupyter extension in VS Code and I'm hoping someone can point me in the right direction.

I'm trying to run a simple Python cell in a .ipynb notebook, but I can't execute anything because the Jupyter extension fails to start. As you can see in the screenshot, I keep getting the error notification: Extension activation failed, run the 'Developer: Toggle Developer Tools' command for more information.

What I've Tried So Far:

Reinstalling: I have completely uninstalled and reinstalled the Jupyter extension (and its related dependencies like the Python extension) multiple times.
Restarts: I have closed and reopened VS Code, and even restarted my computer.
New Environments: I've created fresh virtual environments (using venv) and installed ipykernel within them, but the issue persists no matter which interpreter I select.
Different Files: This happens with any notebook file, even a brand new one with a single print() statement.

I feel like I'm missing something obvious, but I can't figure out what

Top answer

1 of 2

Role back to last months vsix release by downloading and installing it manually. Worked for me

2 of 2

Reinstall the extension and make sure that you have ipykernel package installed

GitHub

github.com › microsoft › vscode-jupyter › issues

Issues · microsoft/vscode-jupyter

microsoft / vscode-jupyter Public · Notifications · You must be signed in to change notification settings · Fork 377 · Star 1.5k · September Endgame · #17019 · Yoyokrazy opened · on Oct 1, 2025 · 3 · Unable to run notebook cells with spaces in path · #17042 · dakenblack opened · on Oct 10, 2025 · 14 · Search Issues · is:issue state:open · is:issue state:open Search · LabelsMilestonesNew issue · Open · Closed · bugIssue identified by VS Code Team member as probable bugIssue identified by VS Code Team member as probable bug ·

Author microsoft

GitHub

github.com › microsoft › vscode-jupyter › issues › 604

jupyter notebook stuck infinitely loading · Issue #604 · microsoft/vscode-jupyter

September 14, 2020 - Issue Type: Bug It's stuck on loading when I open .ipynb files to edit with Jupyter Notebook. There is no feedback either Extension version: 2020.8.108011 VS Code version: Code 1.49.0 (e790b931385d72cf5669fcefc51cdf65990efa5d, 2020-09-10...

Author tbdoan

GitHub

github.com › microsoft › vscode-jupyter › issues › 5114

Jupyter extension is not activating on codespaces · Issue #5114 · microsoft/vscode-jupyter

March 11, 2021 - The Python extension isn't activated when opening a Python file on codespaces. [NOTE: Self-contained, minimal reproducing code samples are extremely helpful and will expedite addressing your issue] Start a codespace out of https://github.com/Microsoft/python-sample-tweeterapp/. Make sure to select the fixwarnings branch, not the main one. ... See the notification error that the Jupyter extension failed to activate.

Author luabud

reddit.com › r/vscode › help: vsc wont load any extensions and i cant connect to python kernels

r/vscode on Reddit: Help: VSC wont load any extensions and I cant connect to Python Kernels

October 13, 2025 -

Hi everyone,

I am currently unable to connect to any Python kernel (and run Jupyter notebooks). However, I can still run Python commands (such as installing packages with pip) within a virtual environment.

My extensions on VSC also never load fully.

Please help.

I have tried to reinstall VSC, but I have had no success.

Top answer

1 of 3

Visual Studio Code is famous for these problems

2 of 3

Stack Overflow

stackoverflow.com › questions › 60968736 › cannot-open-jupyter-notebook-in-vscode

python - Cannot open jupyter notebook in VSCode - Stack Overflow

Top answer

1 of 5

If Python extension is available, (if not install that extension) in VSCode, while the jupyter style file (cells beginning with # %%) is active:

Press Ctrl+Shift+P
Type: Export Current Python File as Jupyter Notebook

2 of 5

An easy way to fix this should be to save the file with an .ipynb ending, vs-code should then automatically start the notebook extension. You can also make sure that you activated a Python environment, then Python: Create New Blank Jupyter Notebook should appear.

An alternative I would recommend is editing notebooks following this guide in the vs-code documentation

Stack Overflow

stackoverflow.com › questions › 79788502 › jupyter-notebook-extension-visual-studio-code-stuck-connecting-to-kernel

Jupyter Notebook extension Visual Studio Code stuck "connecting to kernel" - Stack Overflow

Top answer

1 of 3

It's not the Visual Studio Code update. I've been experimenting on a virtual machine, after my students started complaining this week that their Jupyter Notebooks stopped working...

I've tried downgrading Visual Studio Code, but that didn't solve the problem, so I started looking somewhere else.

As far as I know right now, the problem lies in the Jupyter-extension.

I have first disabled the Auto Update for the Jupyter-extension.
Next, I have downgraded the extension to version 2025.7.0, and it works again.
For good measure, I've then tried to update to version 2025.8.0: it also works.
But, when using version 2025.9.0: it breaks!

So what I would recommend:

In the Extensions-tab, disable Auto Update for the Jupyter extension.
Then use the Install Specific Version-menu to install version 2025.8.0.

After further testing:

The alternative is to Switch to Pre-Release Version, at least version 2025.10.2025101001. That also works.

UPDATE 2025-10-16:

Jupyter extension version 2025.9.1 has been released. This fixes the issue as well.

2 of 3

It seems to be an issue with the version 7.0.0 of the ipykernel python package. The jupyter notebook extension in vscode as well as the jupyter notebook in the browser get stuck in kernel connecting state when a cell is executed. On installing ipykernel==6.30.1, which is the version before 7.0.0, I don't face this issue in vscode or jupyter notebook in browser.

I have created an issue for the same: https://github.com/ipython/ipykernel/issues/1445

Hence I think we have to use ipykernel==6.30.1 until the issue is fixed. You can install it by running
pip install ipykernel==6.30.1

P.S.: ipykernel 7.0.1 has been released and it fixes this issue.