You didn’t use the existing one - you created a new one. Start over (press “Reset All Code”) and start again. You’re form element is correct and the nesting is correct, you just have the wrong input element.
I’ve edited your post for readability. When you enter a code block into a forum post, please precede it with a separate line of three backticks and follow it with a separate line of three backticks to make it easier to read.
You can also use the “preformatted text” tool in the editor (</>) to add backticks around text.