GitHub shows “Notebook not found” for my Jupyter .ipynb file

[F-mehran]

Hello everyone, I’ve been working on several projects in Jupyter Notebook and recently uploaded them to my GitHub repository.
However, whenever I try to open my .ipynb files directly on GitHub, I only get this message: “Notebook not found”
I’ve tried several fixes:
Re-uploading the file
Pushing again using Git
Making sure the repository is public
I’ve also put a file with small size in my github
Even checking on nbviewer.org
Unfortunately, nothing has worked so far - nbviewer also gives me a 404 error.
When I open the same notebook locally in Jupyter, it runs perfectly fine. Here’s an example of one file that won’t display.
Here’s an example of one file that won’t display: https://github.com/F-mehran/Machine-learning/blob/main/recommender_system/Collaborative_Filtering/Collaborative_Filtering.ipynb Does anyone know why GitHub might fail to render this notebook, or how I can fix it so it displays normally?
Thanks in advance for any help.