Reschedule Missed Workout on a Training Plan

Hello, 

This seems to be an issue I have seen here before, but the answers to remedy it aren't working. I was sick this past week, and I would like to miss the run I missed on Thursday. The app on the computer and phone will not allow me to do this. I also tried to get around it by selecting the workout on the watch, but it doesn't give me my missed workout as an option. I am not sure what to do, thoughts?