[Python] Matplotlib canvas has no buffer_rgba attribute

I use the manim-matplotlib technique for animating my plots. On the PC that I am running this on I use a virtual environment. From one day to the other this stopped working and I am wondering why. Matplotlib 3.7.5, Python 3.8

def figtoimg(fig):
fig.canvas.draw()
img = fig.canvas.buffer_rgba()
plt.close(fig)
return img


Using the function above throws the following error:

AttributeError: 'FigureCanvasPgf' object has no attribute 'buffer_rgba'

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