Can't make an account for realms

Put the summary of the bug you're having here

What I expected to happen was...:
Describe what you thought should happen here
Play on realms after I made my account
What actually happened was...:
Describe what happened here
It wouldn't let me click register
Steps to Reproduce:
1. Put a step by step guide on how to trigger the bug here
2. ...type in all info to make an account
3. ...it won't let you click register