Error 404 - this is not the page you are looking for

Good Afternoon,

type or paste code here

Some time ago I downloaded (April, 2020) a file from https://github.com/wagnermnsantos/
Now, this link no longer exists, it displays a message “this is not the page you are looking for.”

I did access to academic study. Please, Is it possible for me to know when the page was offline?

Thanks,

Marta