Sorry for the delay — they won’t be able to communicate via HTTP at all because the TLS connection won’t ever establish. The error you get will be somewhat bumpy because the TLS connection will be shut down before you have a chance to write something to the browser so you can’t even redirect. Not a great UI but the expectation is that this would be used more for API endpoint so this should be less of an issue there.

Applied CBDC Research @ the Federal Reserve — fmr, MIT / Podcaster / Runner / Helicopter Pilot