Help me out here

can’t figure out what’s wrong
Error :

4. Each <section> element with the class of “main-section” should also have an id that corresponds with the text of each <header> contained within it. Any spaces should be replaced with underscores (e.g. The <section> that contains the header “Javascript and Java” should have a corresponding id=“Javascript_and_Java”).

Solved: Sorry guys :smiley: