Well, Xcode is a fickle mistress... been tearing my hair out over the issue and finally decided to close and reopen Xcode. imagine my surprise the error has cleared then I remembered that I had a code error that caused the UI problem, identified it and corrected but the error persisted. took a reboot of Xcode to clear it so I guess the error was stuck. Sorry if I wasted any of your time reviewing this and thanks for being here.