For years I hadn't have any problems with OMV, but suddenly I cannot check manually for updates.
Here are the error-logs, but I have no idea, what they mean:
Code
Failed to execute command 'export PATH=/bin:/sbin:/usr/bin:/usr/sbin:/usr/local/bin:/usr/local/sbin; export LANG=C; apt-get update 2>&1' with exit code '100': Ign file: InRelease Ign file: Release.gpg Ign file: Release Hit http://mirrordirector.raspbian.org jessie InRelease Hit http://packages.openmediavault.org erasmus InRelease Hit http://packages.openmediavault.org erasmus-proposed InRelease Hit http://archive.raspberrypi.org jessie InRelease Ign file: Translation-en Ign http://httpredir.debian.org jessie-backports InRelease Hit https://openmediavault.github.io erasmus InRelease Hit http://packages.openmediavault.org erasmus/partner armhf Packages Hit http://packages.openmediavault.org erasmus/main armhf Packages Ign http://httpredir.debian.org jessie-backports Release.gpg Hit http://packages.openmediavault.org erasmus-proposed/main armhf Packages Ign http://httpredir.debian.org jessie-backports Release Ign http://packages.openmediavault.org erasmus/main Translation-en Ign http://packages.openmediavault.org erasmus/partner Translation-en Hit http://archive.raspberrypi.org jessie/main armhf Packages Get:1 https://openmediavault.github.io erasmus/main Translation-en [9339 B] Ign http://packages.openmediavault.org erasmus-proposed/main Translation-en Hit http://mirrordirector.raspbian.org jessie/main armhf Packages Hit http://mirrordirector.raspbian.org jessie/contrib armhf Packages Ign http://archive.raspberrypi.org jessie/main Translation-en Hit http://mirrordirector.raspbian.org jessie/non-free armhf Packages Hit http://mirrordirector.raspbian.org jessie/rpi armhf Packages Get:2 https://openmediavault.github.io erasmus/main Translation-en [9339 B] Get:3 https://openmediavault.github.io erasmus/main Translation-en [9339 B] Get:4 https://openmediavault.github.io erasmus/main Translation-en [9339 B] Get:5 https://openmediavault.github.io erasmus/main Translation-en [9339 B] Ign https://openmediavault.github.io erasmus/main Translation-en 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 Ign http://mirrordirector.raspbian.org jessie/rpi Translation-en Err http://httpredir.debian.org jessie-backports/main armhf Packages 404 Not Found Err http://httpredir.debian.org jessie-backports/contrib armhf Packages 404 Not Found Err http://httpredir.debian.org jessie-backports/non-free armhf Packages 404 Not Found Ign http://httpredir.debian.org jessie-backports/contrib Translation-en Ign http://httpredir.debian.org jessie-backports/main Translation-en Ign http://httpredir.debian.org jessie-backports/non-free Translation-en Fetched 6742 B in 13s (504 B/s) W: Failed to fetch http://httpredir.debian.org/debian/dists/jessie-backports/main/binary-armhf/Packages 404 Not Found W: Failed to fetch http://httpredir.debian.org/debian/dists/jessie-backports/contrib/binary-armhf/Packages 404 Not Found W: Failed to fetch http://httpredir.debian.org/debian/dists/jessie-backports/non-free/binary-armhf/Packages 404 Not Found E: Some index files failed to download. They have been ignored, or old ones used instead.
and
Code
Stack trace:
#0 /usr/share/php/openmediavault/rpc/serviceabstract.inc(528): OMVRpcServiceApt->{closure}('/tmp/bgstatusPi...', '/tmp/bgoutputbo...')
#1 /usr/share/openmediavault/engined/rpc/apt.inc(223): OMV\Rpc\ServiceAbstract->execBgProc(Object(Closure))
#2 [internal function]: OMVRpcServiceApt->update(NULL, Array)
#3 /usr/share/php/openmediavault/rpc/serviceabstract.inc(124): call_user_func_array(Array, Array)
#4 /usr/share/php/openmediavault/rpc/rpc.inc(86): OMV\Rpc\ServiceAbstract->callMethod('update', NULL, Array)
#5 /usr/sbin/omv-engined(536): OMV\Rpc\Rpc::call('Apt', 'update', NULL, Array, 1)
#6 {main}
What's wrong? What can I do?