Here is what the inspector tells me when I load up my portfolio page. I am using the latest version of React.

14:47:22.595 Warning: validateDOMNesting(...): <a> cannot appear as a descendant of <a>.
a
O@http://localhost:3000/static/js/bundle.js:70118:6
a
div
div
Web
div
div
div
Header@http://localhost:3000/static/js/bundle.js:1746:78
div
div
Home
App react-dom.development.js:67
    React 16
    js index.js:7
    factory react refresh:6
    Webpack 3

Not sure if that issue could explain why one of the images for one section are not displaying while the other ones are, but it's the only error I saw that was not the standard child of prop.

This is the repo for the Portfolio: https://github.com/kstaver/React-Portfolio-v2