Didn't get that far. Pressing "Login" does nothing. Brave, Sidecar.

Weird. I'm using nos2x on Brave without a problem. But that shouldn't have anything to do with the log in button. That just triggers a simple action. Perhaps the page didn't load fully. It canbe a bit slow. I'm wondering if it was too busy loading the Discover Content carousel, but even that shouldn't stop the log in button from activating, that should all be rendered and ready to go.