tkinter failure during execution of python script on linux

[bernhard_LA 0]

I try to run that simple python script with my app using python4delphi components

import matplotlib.pyplot as plt
import numpy as np

x = np.arange(0,4*np.pi,0.1)   # start,stop,step
y = np.sin(x)

plt.plot(x,y)
plt.show()

 

compiling and execution of my app for windows  is no problem ,  the LINUX version failed this failure 

 

......
import _tkinter # If this fails your Python may not be configured for Tk
ValueError: character U+68002f is not in range [U+0000; U+10ffff
....

Error is  EPyValure Error  with above code 

Edited June 15, 2021 by bernhard_LA