Failed to execute command 'export LANG=C; apt-get update 2>&1': Ign file: Release.gpg Ign file: Release Err file: Packages File not found
at the end of the output it says:
W: Failed to fetch file:/var/cache/openmediavault/archives/Packages File not found
This doesn't prevent new packages from showing up and is a minor issue to me, I just thought it might be useful to report.