cx_Freeze converted GUI-app (tkinter) crashes after pressing plot button

I’ve been dealing with this for days now and hope to find some help. I developed a GUI-application with imported modules tkinter, numpy, scipy, matplotlib, which runs fine in python itself. After having converted to an exe everything works as expected, but NOT the matplotlib section. When I press my defined plot button, the exe simply closes and doesn’t show any plots.
So I thought to make a minimal example, where I simply plot a sin-function and I’m facing the same issue:
Works perfect in python, when converting it to an exe it crashes when pressing the plot button. Here is the minimal example:

Tkinter window says (not responding) but code is running

I have a program that runs a long process after you click an action button. As the process is running the root window will say that it is not responding even though I know the program is running in the background. This program is going to be released to a few people that I work with and I want to make sure they don’t freak out and close the window when they see this. The solution I have is sitting a root.update in the loop of the process that is running but I am not sure this was the best fix.