Unable to save changes made to the Python Script node in Knime

I am trying to update the python script node with additional code. I did click on Run all and check if my updated code works, and it does. However, for some reason, I am unable to save the python code. In the attached screenshot, you can see that the execution is successful but the “Ok” button on the bottom right corner is faded out/not clickable.

What could possibly be the problem?

Any advice would be helpful.

Thanks!