I just joined MPMUDEV again to get some updates. Pro Sites was working great with the older version. Today, I upgraded it to the latest version and it won't do anything when you click on the button to pay for a Pro Site Level. Before it would take me to Paypal. Now nothing.
FYI, nothing has changed on my site except for just upgrading the plugin. So it's nothing to do with anything but the update or Pro Sites.
Please help quick!