Attempting to sign up for Querki gets an RSOD

(Bug, Closed -> Fixed, Priority: Critical, Test Status: No automated tests yet , Reported By Justin du Coeur, )
Users and Identity
Summary: This is bug was caused by the recent clustering changes -- we have a bit of vestigial code that expects a PlayRequestContext where it's getting a RequestContext. That pathway needs to be fixed.
Actually, the problem was in Join a Space.