I’d like to reproduce what you’re seeing here.
Is the Sign Up link you refer to one that is in an which you created?
Are you seeing any messages in the Chrome Debugger?
The tutorial you refer to us made by a user - it’s not an official one.
Minimum password complexity is a controversial topic these days. We designed ours around current best practices. If you want something easier to remember, you can also use a passphrase which is at least 20 characters long. I’m reminded of this: