Couldn't activate Pace Partners

Last night (9 PM Eastern time) I tried to use Pace Partners for the first time. My world was set to Watopia. At “Join another Zwifter” I chose Pace Partners and then a D ride (I don’t remember which). The “Next” button took me back to the previous screen where I chose “Ride”. I was pedaling as I waited for Watopia to load because I wanted to be up to the Pace Partners’ speed. However, when Watopia loaded there wasn’t any Pace Partners group (just a standard route with a few riders passing by). I then logged off completely and started another Zwift session. This time I chose a C Pace Partners ride --> same result. What was I doing wrong?
Thanks.
Don C.