How to correctly use Histogram("AudioLevels") in latest avisynth?

[Jamaika1]

How to correctly use Histogram("AudioLevels") in latest avisynth?
In version AviSynth+ 3.7.3 (r4195-0385677, "x86_64") function worked.

a = LwLibavAudioSource("input_yuv420p.avi").ConvertAudioToFloat().AudioBoost(boost=3.0, curve=2, norm=false)
v = ColorBarsHD(1280, 720, "YV24")
AudioDub(v, a)
Trim(0, Ceil(a.AudioDuration*FrameRateNumerator/FrameRateDenominator))
Histogram(mode="AudioLevels")
FlipHorizontal()
GetChannels(2, 1)
Histogram(mode="StereoOverlay")
FlipHorizontal()
Info("DejaVu Sans Mono", 18)