Brocken locale in installer

[php]perl: warning: Setting locale failed.
perl: warning: Please check that your locale settings:
LANGUAGE = “ru:en”,
LC_ALL = (unset),
LC_TIME = “et_EE.UTF-8”,
LC_MONETARY = “et_EE.UTF-8”,
LC_ADDRESS = “et_EE.UTF-8”,
LC_TELEPHONE = “et_EE.UTF-8”,
LC_NAME = “et_EE.UTF-8”,
LC_MEASUREMENT = “et_EE.UTF-8”,
LC_IDENTIFICATION = “et_EE.UTF-8”,
LC_NUMERIC = “et_EE.UTF-8”,
LC_PAPER = “et_EE.UTF-8”,
LANG = “ru_EE.UTF-8”[/php]
are supported and installed on your system.
perl: warning: Falling back to the standard locale (“C”).

It should be ru everywhere. But this is not. Issue appear if you choice another language for the country. For ex. I chose RU in Estonia, and that I have in the end, broken locale.

Try to set the correct locales in /var/lib/locales/supported.d/local and run the terminal command sudo dpkg-reconfigure locales to fix this issue.