Keygame

I cannot get past the username creation screen. The submit button does not appear to do anything

Using Chrome Version 125.0.6422.14

Error from console:
Access to fetch at 'https://mudfish-trusting-happily.ngrok-free.app/' from origin 'https://html-classic.itch.zone' has been blocked by CORS policy: Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource. If an opaque response serves your needs, set the request's mode to 'no-cors' to fetch the resource with CORS disabled.