Settings file xxx doesn't contain values for the following parameter:

Why when trying to import the parameters of an optimization, the values of a TimeFrame are not imported?
Is the message: "Settings file does not contain 'xxx values for the Following parameter"

And because I can not select multiple values in the optimization?

[Parameter("EMA Timeframe2", DefaultValue = "Minute15")]
        public TimeFrame EMATimeframe2 { get; set; }