I don't know and I don't care why would you want to copy a website from the internet.
But since it's possible and there are tools built for this task I'll share it down below with you.
The most popular website copier is https://www.httrack.com/ but if this one fails you can try these:
1. Ncollector Studio
2. Local Website Archive
3. SiteSucker
4. DARCY RIPPER
5. Fresh WebSuction
Drop a LIKE if you find this useful.