PHP 7 upgrade error : add-apt-repository is broken with non-UTF-8 locales

Hi,

So, I’m trying to upgrade on Ubuntu 14.04 / PHP 5.5 to PHP 7 by following this tutorial : https://www.digitalocean.com/community/tutorials/how-to-upgrade-to-php-7-on-ubuntu-14-04 .

In this tutorial there’s a workaround for this error :

WARNING: add-apt-repository is broken with non-UTF-8 locales, see https://github.com/oerdnj/deb.sury.org/issues/56 for workaround:

There’s a workaround in the tutorial itself as such :

sudo apt-get install -y language-pack-en-base
sudo LC_ALL=en_US.UTF-8 add-apt-repository ppa:ondrej/php

However, when doing this, nothing changes. I get the same error … anyone know how to solve it ?

Thanks, Lex