Is this still a problem? I have received similar errors when running sudo apt-get update
:
osmc@osmc:~$ sudo apt-get update
Ign http://mirrordirector.raspbian.org jessie InRelease
Ign http://mirrordirector.raspbian.org jessie Release.gpg
Ign http://mirrordirector.raspbian.org jessie Release
Hit http://apt.osmc.tv jessie InRelease
Hit http://apt.osmc.tv jessie/main armhf Packages
Err http://mirrordirector.raspbian.org jessie/main armhf Packages
404 Not Found [IP: 5.153.225.207 80]
Err http://mirrordirector.raspbian.org jessie/contrib armhf Packages
404 Not Found [IP: 5.153.225.207 80]
Ign http://apt.osmc.tv jessie/main Translation-en
Err http://mirrordirector.raspbian.org jessie/non-free armhf Packages
404 Not Found [IP: 5.153.225.207 80]
Ign http://mirrordirector.raspbian.org jessie/contrib Translation-en
Ign http://mirrordirector.raspbian.org jessie/main Translation-en
Ign http://mirrordirector.raspbian.org jessie/non-free Translation-en
W: Failed to fetch http://mirrordirector.raspbian.org/raspbian/dists/jessie/main/binary-armhf/Packages 404 Not Found [IP: 5.153.225.207 80]
W: Failed to fetch http://mirrordirector.raspbian.org/raspbian/dists/jessie/contrib/binary-armhf/Packages 404 Not Found [IP: 5.153.225.207 80]
W: Failed to fetch http://mirrordirector.raspbian.org/raspbian/dists/jessie/non-free/binary-armhf/Packages 404 Not Found [IP: 5.153.225.207 80]
E: Some index files failed to download. They have been ignored, or old ones used instead.