I've been trying to register to the 3Plus app, whenever I enter an email address (I've tried it with two different ones), it always tells me there's an "unknown error". How do I fix this? I've previously had a 3Plus account but have forgotten the password. I clicked the "forgot password" button but whenever I enter my number for the app to send me a text, it just tells me my number and password don't match? Any help would be greatly appreciated.