I am not sure how to debug this entirely so not really sure where it is saying the error exists... Here is the repository: https://github.com/kstaver/React-Portfolio

Error #2. Three more promise rejection errors exists as well, but I will put those in a different question.

Warning: Invalid DOM property `class`. Did you mean `className`?
h4
div
a
LinkWithRef@http://localhost:3000/React-Portfolio/static/js/bundle.js:40465:7
NavLinkWithRef@http://localhost:3000/React-Portfolio/static/js/bundle.js:40512:7
nav
./node_modules/react-bootstrap/esm/Navbar.js/Navbar<@http://localhost:3000/React-Portfolio/static/js/bundle.js:12120:70
div
Navigation
header
div
Header@http://localhost:3000/React-Portfolio/static/js/bundle.js:581:1
Router@http://localhost:3000/React-Portfolio/static/js/bundle.js:40883:7
BrowserRouter@http://localhost:3000/React-Portfolio/static/js/bundle.js:40360:7
div
App