I think this might be related? (matplotlib/matplotlib#25484), I am not using this repos software, but i am using matplotlib version 3.10 and getting this error from trying to show plots in the jetbrains IDE PyCharm 2024.1.3 (Professional Edition, Runtime version: 17.0.11+1-b1207.24 x86_64, macOS 12.7.6) viewer:

trace:

...
lib/python3.12/site-packages/matplotlib/pyplot.py", line 614, in show
    return _get_backend_mod().show(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Applications/PyCharm.app/Contents/plugins/python/helpers/pycharm_matplotlib_backend/backend_interagg.py", line 41, in __call__
    manager.show(**kwargs)
  File "/Applications/PyCharm.app/Contents/plugins/python/helpers/pycharm_matplotlib_backend/backend_interagg.py", line 144, in show
    self.canvas.show()
  File "/Applications/PyCharm.app/Contents/plugins/python/helpers/pycharm_matplotlib_backend/backend_interagg.py", line 85, in show
    buffer = self.tostring_rgb()
             ^^^^^^^^^^^^^^^^^
AttributeError: 'FigureCanvasInterAgg' object has no attribute 'tostring_rgb'. Did you mean: 'tostring_argb'?

Process finished with exit code 1
...

Workaround is using matplotlib version 3.9.4 and below i think... (at least i tested with 3.9.4 and that solved my issue

AttributeError: 'FigureCanvasAgg' object has no attribute 'tostring_rgb' #2411

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