Fix Syntax Errors on Crypto Website

Hi, a long time ago I bought a website about cryptocurrencies, and now when I run npm start, it shows me a lot of syntax errors, and I don't understand what's wrong. Recently, I was looking for someone who could fix it for me, but I couldn't find anyone; I was told that the website is quite complicated.

I will attach the source code below; please check if you can fix it, and I will wait for your response.