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: