Custom WSL Distro build error in VS - MSB6006"cmd.exe" exited with error code 1.

[wslnoob]

Hello Everyone,
I am totally new in building WSL custom distro, so sorry if I miss something trivial.
When I try to build the custom distro from VS2019 Enterprise by following instructions on GitHub, I am getting error during the build (attached screenshots).

What I did:

• downloaded Ubuntu 1804.2019.521.0 from Store for Business portal and installed / initialized it on a template machine
• installed / configured few things inside the "vanilla" distro and exported it with wsl --export command into a tar.gz file
  -copied the exported/customized tar.gz file into WSL-DistroLauncher-master\DistroLauncher-Appx folder
  -started the build in VS

Could you please advise what can be wrong?

Regards,
wslnoob