trouble setting buttonTextColor

[jonathan3087]

My code is:

let alert = PCLBlurEffectAlertController(title: title,
message: message,
effect: UIBlurEffect(style: .extraLight),
style: .alert)

alert.configure(buttonFont: UIFont.systemFont(ofSize: 24),
buttonTextColor: Constant.SLS_SECONDARY_COLOR,
buttonDisableTextColor: Constant.SLS_DISABLED_COLOR)

Getting error on the highlighted part that says,
Cannot convert value of type 'UIFont' to expected argument type '[PCLBlurEffectAlert.ActionStyle : UIFont]?'

Please help, I don't understand what this error means or how to fix.