I am asking this question again, because I haven't got any update for my previous question, even though I have made new comments 20 days ago to describe my issue. The question can be found here.

To summarize:

After restarting the kernel, I run the following suggested solution`import matplotlib`

`matplotlib.use('Qt5Agg')`

`import matplotlib.pyplot as plt`

, and still got the same error:`ImportError: Cannot load backend 'Qt5Agg' which requires the 'qt5' interactive framework, as 'headless' is currently running`

Can someone please help me to solve this problem? It is really important for me to use interactive plots.