BBM Music Beta trial expired? Here's how to get it working again

Yesterday, it was officially one month since the launch of BBM Music's private beta. Many users that downloaded BBMM at launch received the above message at different times when trying to open the app and play music. The Upgrade message is what it'll look like after a user goes through their first one month trial once BBMM launches officially. Unfortunately though, BBMM is still in beta and clicking the upgrade button just leads to another error in the app.