Why is the sign up button is not working?

Hello, I'm new to MIT, and I tried this YouTube tutorial, but it doesn't seem to work. Please assist me in fixing the issue. I got stuck for a long time. Thanks :smiley:

What tutorial?

https://youtu.be/Cmy0VueB1zc?si=QFgmQo2BfFiqlIOf this one

And what does not work? Did you just download the aia from the obsidian website?