If you have a Group Ride scheduled on an easy or endurance day and you rated the effort as hard, we just want to know why a ride of that type was difficult, as we likely expected it to be easy.
Just rate it how it felt. We’ll look at any data that you have in the ride file, so it’s not like we’re blindly hearing that an easy ride felt hard on that day.
I’d definitely recommend using our definitions of each RPE score to rate your activities, though. If the ride wasn’t challenging, don’t rate it as hard. 
If those rides are actually hard, then I’d swap your schedule to put a hard workout in place of that Group Ride rather than an easy one.