It means there is to many people trying to register, its crashing. They only let a certain amount of people register per day. You might need to wait until tomorrow. But just keep trying. And once you do. Go into your settings, and download and updates. And download the software.
Yeah, I got this too, amongst other errors. I ended up erasing my phone (not unusual for a beta). As soon as I erased and setup my phone it was working normally. I tried a lot before an erase too but nothing worked.