Scheduler not working despite being installed and enabled

[Padamire]

Hi guys

I recently installed Jupyter_Scheduler but was met with a pop up saying 'Jupyter Scheduler server extension not found', explaining the extension is installed but cannot be activated, as shown in the image below.

After following the recommendations, I ran mamba list to see the downloaded packages within anaconda, one of which was jupyter_scheduler v. 2.4.0. I then ran jupyter server extension list, which gave the following output.

Showing that jupyter scheduler's server extension is installed and enabled.

However, when I refresh the page, I get the same error popup saying that the scheduler is installed but not activated.

I have seen a workaround at jupyterlab/jupyterlab#8122 but they ask to delete the build-config.json file, which should be in JupyterLabs settings file, but the settings file is empty.

Is there any way to fix this? I've tried every possible way: Installing from Pypi, running pip install instead of mamba install etc. I've burned countless hours trying to fix it and there never seems to be a solution.

• Browser: Chrome
• Jupyter Server version: Jupyter Lab 4.0.8

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[JasonWeill]

@Padamire Thanks for opening this issue! It looks like you're using Windows. Can you share more info about your setup? (Windows version, whether you're using Windows Subsystem for Linux, etc)

[Padamire]

Hi Jason- I'm using Windows 11 (Version 22H2). I also have Anaconda Navigator installed to manage all my projects.

[JasonWeill]

I just tried to install Jupyter Scheduler 2.4.0 on my Windows machine (Windows 10, JupyterLab 4.0.8, Miniconda) using the instructions for installation and verification, and I was successful. Do you see the same problem with a fresh Conda environment?

[JasonWeill]

As observed in jupyterlab/jupyterlab#15658, you might have tried to install jupyterlab_scheduler, which is an unrelated extension. Please let us know if you still see this problem after going through the instructions linked above. Thanks!

[andrii-i]

@Padamire, could you please send a (sanitized) output of jupyter troubleshoot command from your terminal? It would help in troubleshooting.

[andrii-i]

Closing as non-active.

@Padamire, please check that you have jupyter-scheduler, not jupyterlab_scheduler installed as discussed here and in jupyterlab/jupyterlab#15658. If the problem still persists, please feel free to reopen the issue and send a (sanitized) output of jupyter troubleshoot command from your terminal.