Maybe but IPv6 shouldn't stop you from accessing the web sockets server. I'm scratching my head on this one. Any way you can switch to IPv4 and see if you can access then? I apologize for the issues.
Discussion
Not really sure how to tell a browser to use IPv4. FWIW I've tried Brave, Chrome, and Safari. Same syptoms. White screen with these logos. Strangely when I configure Safari to use "iCloud Private Relay" it works.
Ah I bet you got blocked by the rate limiter. What's the v6 IP? I'll check it and clear it if it got blocked and tweak the settings so they're not as strict. Had some bad bots recently so was a bit more aggressive than maybe I should have been.