Unable to save Jupyter Notebook in VSC

Question

I've made changes to .ipynb-file in Visual Studio Code, but I'm unable to save it. I've tried 4 ways and each of them doesn't work:

1. Ctrl + S (nothing happens)
2. Via File > Save (is permanent greyed out)
3. Via File > Save As... (nothing happends, no pop-up of the window explorer)
4. Pressing the save-button in the notebook (nothing happens)

As you can see in the screenshot below, marked with the star, there are changes to save. What do I do wrong or how to solve this issue?

Answer 1

I solved this by adding the .ipynb to my filename and selecting 'No Extension' for Save as type which is found on the very bottom of the dropdown for Save as type.