This is a heavily interactive web application, and JavaScript is required. Simple HTML interfaces are possible, but that is not what this is.
Post
John Mueller
johnmu.com
did:plc:4cv34f5o756rx377sm3mhrhm
"Validate fix" for things like this is basically just a note for yourself. With structured data, it's possible to go from "invalid" to "valid" markup, but a 404 page isn't something you need to fix (if it doesn't exist). 5XX errors are a bit different, so I'd make sure they don't exist :-).
2025-11-06T10:09:34.257Z