My portfolio page zaki

This is my portfolio page link https://codepen.io/ZakiAlam/full/JJdmZV
I am facing some issues like if i click About button it doesnt show the <div of Front-End Developer and UX/UI designer,…>
it takes me to the second < div Web Developer - User Experience Designer - Graphic Artist…>
as far as i m understanding on clicking it is shadowed by the qlip header, Kindly help.