Addon throws `StandardButton` exception

[relikd]

15:52:45  pyException: Traceback (most recent call last):
  File ".../FreeCAD/v1-1/Mod/LCInterlocking/./panel/treepanel.py", line 100, in getStandardButtons
    return int(QtGui.QDialogButtonBox.Ok | QtGui.QDialogButtonBox.Cancel)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
<class 'TypeError'>: int() argument must be a string, a bytes-like object or a real number, not 'StandardButton'

Not sure if FreeCAD has a wrong mapping, but in PySide6 it is:

QtGui.QDialogButtonBox.StandardButton.Ok