I am paying £38 a month for Sport and Boost but when I go to Discover to watch old rugby games, the app is telling me I need a Now Sport Membership...which I am already paying for! All the Live channels work...this has never been an issue before?!
Have you tried signing out and back in on your playback device ?
Also do you have any other playback devices to see if the Rugby on Demand folders play ?
I am using an Android Tablet and the NOW App on Demand Sports plays for me.