Attached please find the screenshot for your reference.
And, in the help of Dev Express library (6.45):
1. Breaking Change – The AEnabled Boolean parameter has been added into the TcxCustomLookAndFeelPainter.GroupBoxTextColor class function. Pass True to this parameter to indicate that the TcxGroupBox control is enabled.
2. Breaking Change – The AHasTextArea Boolean variable parameter has been added into the TcxCustomLookAndFeelPainter.SchedulerNavigationButtonSizes class method. To retain the SchedulerNavigationButtonSizes functionality as in previous Builds, pass True to this parameter.
Hope the above can help in tracing the problem