Need help understanding error messages in React project

JavaScript
1

https://codepen.io/Ahamed_Yaseer/pen/ZNyqeq
Please help me solve this i don’t know where i am getting blocked.

4

Thank you Randell Dawson.I have another query regarding the project. I have done necessary changes that you have recommended and the html is rendered. The query is the New Quote button is not working fine.I have tried using different function but still no result.Could you help me where i went wrong?

The Code link: https://codepen.io/Ahamed_Yaseer/pen/ZNyqeq

Thanks in advance