AttributeError: 'FrameServer' object has no attribute 'scene'

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I have download the latest manim-render and open it,
then i copy the code
from manim import *

class FunctionPlotWithLabelledYAxis(GraphScene):
    def __init__(self, **kwargs):
        GraphScene.__init__(
            self,
            y_min=0,
            x_min=0,
            y_max=1,
            x_max=2*PI,
            axes_color=GREEN,
            y_axis_config={"tick_frequency": PI/4},
            x_axis_config={"tick_frequency": PI/4},
            y_labeled_nums=np.arange(0, 1, 1/2),
            x_labeled_nums=np.arange(0, 2*PI, PI/4),
            **kwargs
        )

    def construct(self):
        self.setup_axes(animate=True)
        dot = Dot().move_to(self.coords_to_point(PI / 2, 0))
        func_graph = self.get_graph(lambda x:  np.sin(x))
        self.add(dot)
        self.play(Create(func_graph))

then i run manim scene.py --renderer=webgl -qh in terminal and got an error and electron render show nothing.
AttributeError: 'FrameServer' object has no attribute 'scene'.
Anything wrong with my operation step or code ?

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Traceback (most recent call last):
File "c:\users\administrator\appdata\local\programs\python\python39\lib\site-packages\manim\grpc\impl\frame_server_impl.py", line 219, in FetchSceneData
name=str(self.scene),
AttributeError: 'FrameServer' object has no attribute 'scene'