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Error in Gamma Calibration

Running standalone 2021.2.3 on MacOS (Big Sur 11.5.2).

I tried to run gamma correction in semi mode, but when the input table is supposed to appear at the end, it gives me an error and crashes. Does anyone know how to solve this problem…?

Traceback (most recent call last):
File “/Applications/PsychoPy.app/Contents/Resources/lib/python3.6/psychopy/monitors/MonitorCenter.py”, line 830, in onCalibGammaBtn
File “/Applications/PsychoPy.app/Contents/Resources/lib/python3.6/psychopy/monitors/MonitorCenter.py”, line 1121, in init
wx._core.wxAssertionError: C++ assertion “!(flags & wxALIGN_RIGHT)” failed at /Users/robind/projects/bb2/dist-osx-py36/build/ext/wxWidgets/src/common/sizer.cpp(2168) in DoInsert(): Horizontal alignment flags are ignored in horizontal sizers

Any help is greatly appreciated.