"Cannot find type 'TextFiefldFormableRow' in scope"

[jderbs]

Have this protocol implemented in a file, and it's worked for months. All of a sudden I started getting this error. Not sure why. Here's the file:

import UIKit
import Former
import PhoneNumberKit

class PhoneNumberField: UITableViewCell, TextFiefldFormableRow {

    @IBOutlet weak var titleLabel: UILabel!
    @IBOutlet weak var textField: PhoneNumberTextField!

    override func awakeFromNib() {
        super.awakeFromNib()
        titleLabel.textColor = .formerColor()
        textField.textColor = .formerSubColor()
        textField.countryCodePlaceholderColor = Colorify.Marina

        if #available(iOS 11.0, *) {
                    PhoneNumberKit.CountryCodePicker.commonCountryCodes = ["US", "CA", "MX", "AU", "GB", "DE"]
        }

    }

    override func setSelected(_ selected: Bool, animated: Bool) {
        super.setSelected(selected, animated: animated)

        // Configure the view for the selected state
    }

    func formTextField() -> UITextField {
        return textField
    }

    func formTitleLabel() -> UILabel? {
        return titleLabel
    }

    func updateWithRowFormer(_ rowFormer: RowFormer) {}
}