'Why does Animation not work in Avalonia? it said Unable to cast object of type 'Avalonia.Animation.AnimatorKeyFrame' to type 'Avalonia.IStyledEleme;

I want to make a animation like

<Style.Animations>
        <Animation Duration="0,0,1" PlaybackDirection="Normal" FillMode="None">
            <KeyFrame KeyTime="0.5">
                <Setter Property="Width" Value="{TemplateBinding Width}" />
                <Setter Property="Height" Value="{TemplateBinding Height}" />
            </KeyFrame>
        </Animation>
    </Style.Animations>

but it tell me Unable to cast object of type 'Avalonia.Animation.AnimatorKeyFrame' to type 'Avalonia.IStyledEleme;

How can I Solve the problem?



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