Error being thrown: 4. Each element with the class of “main-section” should also have an id that corresponds with the text of each contained within it. Any spaces should be replaced with underscores (e.g. The that contains the header “Javascript and Java” should have a corresponding id=“Javascript_and_Java”).
Each element with the class of “nav-link” should contain text that corresponds to the <header> text within each <section> (e.g. if you have a “Hello world” section/header, your navbar should have an element which contains the text “Hello world”).