Trouble Retrieving Custom Error Messages from Schema Parse Issues

I am following those docs here for custom error messages on Schema parse issues: https://effect.website/docs/schema/error-messages/#custom-error-messages. I can't figure out how to get the actual message back for the error case that I am facing so that I can process that error specifically (e.g communicate it to the user with a nicer text) https://effect.website/play#15bad2bd9a91 Any help appreciated!

Effect Documentation

Effect Documentation

Customize and enhance error messages for schema decoding with default, refined, and custom messages.