Error message

/usr/local/lib/python3.11/dist-packages/matplotlib/__init__.py:156: UserWarning: The NumPy module was reloaded (imported a second time). This can in some cases result in small but subtle issues and is discouraged.
  import numpy
Traceback (most recent call last):
  File "/home/malith/Documents/Assignments/python - software project/code/q.py", line 2, in <module>
    import matplotlib.pyplot as plt
  File "/usr/local/lib/python3.11/dist-packages/matplotlib/__init__.py", line 161, in <module>
    from . import _api, _version, cbook, _docstring, rcsetup
  File "/usr/local/lib/python3.11/dist-packages/matplotlib/rcsetup.py", line 27, in <module>
    from matplotlib.colors import Colormap, is_color_like
  File "/usr/local/lib/python3.11/dist-packages/matplotlib/colors.py", line 52, in <module>
    from PIL import Image
  File "/usr/lib/python3/dist-packages/PIL/Image.py", line 89, in <module>
    from . import _imaging as core
ImportError: cannot import name '_imaging' from 'PIL' (/usr/lib/python3/dist-packages/PIL/__init__.py)

Here is my code with the import.

Code

import matplotlib.pyplot as plt

def plot_letter_distribution(s):
    letter_counts = letter_count(s)
    letters = list(letter_counts.keys())
    counts = list(letter_counts.values())

    plt.figure(figsize=(12, 6))
    plt.bar(letters, counts)
    plt.xlabel('Letters')
    plt.ylabel('Count')
    plt.title('Letter Distribution')
    plt.show()

Error is coming from the matplotlib import. Does anyone know the potential issue here. I have already installed the numpy and matplot lib packages too.