BuddyPress.org

I’m trying to send a private message to another user (or any user) and it gives me an error that the username is incorrect. I have tried several users and their usernames as well as full names. I have no dropdown or anything I’m just typing them in. Is there supposed to be a drop down? I need help with this ASAP we are trying to launch and this will hold everything up. I can provide login information in a private message, but it is not a current live site.