Fix a simple react.js app

I need a React.js developer who can fix a simple react.js bug. The bug is that ... the page keeps loading instead of displaying UI components. In the attached folder of the project, go to the /assets/ folder and you will see [ before.png ], that's how the page was before ... compared to now that it is just loading instead of showing the design.

What's your budget?
What's your timeline?
What do you need to get started?

-- Banjo