Cannot download any packages, error with nvidia-l4t-kernel-dbts (--confirmed)

Hi I need some help with my Jetson Xavier.
When I perform a simple say sudo apt-get install tmux package installation I get the following error:

After this operation, 0 B of additional disk space will be used.
Do you want to continue? [Y/n] Y
Setting up nvidia-l4t-kernel-dtbs (4.9.140-tegra-32.4.4-20201027211332) ...
Decompile /boot/dtb/kernel_tegra194-p3668-all-p3509-0000.dtb
tegra194-p3668-all-p3509-0000.dtb failed, quit.
dpkg: error processing package nvidia-l4t-kernel-dtbs (--configure):
 installed nvidia-l4t-kernel-dtbs package post-installation script subprocess returned error exit status 1

Errors were encountered while processing:
 nvidia-l4t-kernel-dtbs
 ntp
E: Sub-process /usr/bin/dpkg returned an error code (1)

I can provide other info as necessary if this is insufficient.

hello jb_26,

had you tried apt-get update, to update list of available packages.