Error: 'C.UTF-8' is not a supported language or locale

[JPHein]

I: Configuring nplan...
I: Configuring networkd-dispatcher...
I: Configuring kbd...
I: Configuring console-setup-linux...
I: Configuring console-setup...
I: Configuring ubuntu-minimal...
I: Configuring libc-bin...
I: Configuring systemd...
I: Configuring ca-certificates...
I: Configuring initramfs-tools...
I: Base system installed successfully.
Error: 'C.UTF-8' is not a supported language or locale
error: LTSP client installation ended abnormally

sudo dpkg-reconfigure locales does not fix it

sudo locale-gen C.UTF-8
Error: 'C.UTF-8' is not a supported language or locale

lsb_release --all
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 18.04.1 LTS
Release: 18.04
Codename: bionic

uname -r
4.15.0-1030-azure

Using the greek school's ppa deb http://ppa.launchpad.net/ts.sch.gr/ppa/ubuntu bionic main

[JPHein (jp-jphein)]

#!/bin/bash
# tadaen sylvermane | jason gibson
# configure locales for ubuntu bionic ltsp chroot creation

for var in LC_ALL= LANG= ; do
        export "$var"en_US.UTF-8
done
ltsp-build-client --chroot "$1"

[Alkis Georgopoulos (alkisg)]

Closing old LTSP bugs as they're no longer relevant after LTSP has been rewritten from scratch.