E: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/bionic/main/binary-arm64/Packages 404 Not Found [IP: 91.189.91.14 80]
E: Failed to fetch http://us.archive.ubuntu.com/ubuntu/dists/bionic-updates/main/binary-arm64/Packages 404 Not Found [IP: 91.189.91.14 80]
E: Some index files failed to download. They have been ignored, or old ones used instead.
How can I fix it ?
Thanks.