I am new to SE and am having issues with creating a form in sharepoint. I tried following a tutorial from: https://www.concurrency.com/blog/august-2016/custom-sharepoint-form-using-office-ui-fabric-and

But when I completed the tutorial, it ended up like this: https://ibb.co/LQ5PPvp

Aside from these lines of code: https://ibb.co/H7zXhdQ, I tried to follow the tutorial as closely as possible. And am unsure where I went wrong.

This is my database: https://ibb.co/s2sKzF8.