Add to it this as well:
Qubes specific: If user removed qubes-core-agent-passwordless-root he will get this issue.
so to correctly address the issues here:
- Issue (1)
bwrap: Can't find source path /sys/block: Permission denied
Due to hide hardware information
- Issue (2)
error: Flatpak system operation ConfigureRemote not allowed for user
Due to user removed qubes-core-agent-passwordless-root package from his VM in Qubes.
Note: if both are enabled, it will just show Issue (2)