Neglecting to solve the captcha on sign up yields a blank white page for the end user
If a user fails to solve the captcha on sign up, they will be presented with a blank white page after submitting the form. User should be returned to the sign in/up page with an appropriate error message.
Steps to reproduce:
- Go to GitLab.com
- Fill out the sign up form, completing all fields EXCEPT the captcha.
- Click the sign up button.
- Observe the white page.
cc/ @DouweM Please weigh/assign.