Return missing from this function?

I'm getting this error "Missing return in a function expected to return 'NSAttributedString?'"

Can someone please help? I'm beating my small brain--prone to idiot mistakes--out over this thing. I put the "dummyString" line in to ensure there was a return, but no luck.

TIA

func pickerView(_ pickerView: UIPickerView, attributedTitleForRow row: Int, forComponent component: Int) -> NSAttributedString? {

    let dummyString = "Dummy String"


    if component == 1 {
        return NSAttributedString(string: denomArray[row], attributes: [NSAttributedString.Key.foregroundColor: UIColor.yellow])

    }else if component == 0 {
        if issuerArray [row] == "US" {
            return NSAttributedString(string: self.issuerArray[row], attributes: [NSAttributedString.Key.foregroundColor: BaseViewController.Flag.us.themeColor])
        }
        if issuerArray [row] == "Canada" {
            return NSAttributedString(string: self.issuerArray[row], attributes: [NSAttributedString.Key.foregroundColor: BaseViewController.Flag.canada.themeColor])
        }

    }else{
        return NSAttributedString(string: dummyString, attributes: [NSAttributedString.Key.foregroundColor: UIColor.red])

    }
}