I have the same issue as cloud9j:

root@kali:~# apt-get update --fix-missing
Err:1 http://repo.kali.org/kali kali-rolling InRelease
403 Forbidden
Reading package lists... Done
E: Failed to fetch http://repo.kali.org/kali/dists/kali-rolling/InRelease 403 Forbidden
E: Some index files failed to download. They have been ignored, or old ones used instead.
root@kali:~#

Nothing in this threat has helped. issue remains.
Any help appreciated.