The message "Invalid YAML" is not in "en.json"

[henrikfalk]

I am not able to translate the message "Invalid YAML" because it is not in "en.json".

[ericaxu]

@liamcain Could you take a look when you have time please? Thank you!

[ericaxu]

Unfortunately we tried to make the change, but there's a technical difficulty where it would break Publish pretty badly. We'll look into alternative ways to fix it. Thanks!