E: Some index files failed to download. They have been ignored, or old ones used instead

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.

Hi,

Does this issue happen on your host or your nano?

This happens on Nano.

I closed to first 7 option.

https://ibb.co/yd70bJd

And then I opened to recommended updates and unsupported updates.

https://ibb.co/6n17JCM

The problem has been solved, but I don’t know if I solved it correctly.

If this causes your apt fail to download some software, then please let us know.