More specific error messages

I was getting the error "The submitted text must be a valid text." that wouldn't let me publish the form, and I thought it had something to do with one of the fields in the form. I even had a chat with support because I couldn't understand what was happening. After trying some things together and not working, I scrolled down a bit more on the left sidebar, only to realise that the error was coming from the Success message text, which was empty.

My suggestion would be to have more specific error messages, at least adding the name of the field that got the error.