Help needed to fix the twelfth error

I’m doing the fourth FFC challenge, and I can’t find the mistake for it.
Technical Documentation Page about HTML

Please do not ask the same question in multiple places. It is confusing and will lead to duplicate answers.

Here is my response in your other thread.

Did I fix it right, because the score didn’t increase?

Please do not create duplicate topics for the same challenge/project question(s). This duplicate topic has been unlisted.

Thank you.