Thank you for answer, problem was in locale encoding of linux.
Everything must be en_US.utf8

Now LAVA is working for me.

Ilya

From: Steve McIntyre <steve.mcintyre@linaro.org>
Sent: Monday, September 2, 2019 6:02:19 PM
To: Milosz Wasilewski <milosz.wasilewski@linaro.org>
Cc: Ilya Fedusiv <ilya.f@l4b-software.com>; lava-users@lists.lavasoftware.org <lava-users@lists.lavasoftware.org>
Subject: Re: [Lava-users] 500 Internal Server Error

On Mon, Sep 02, 2019 at 03:58:31PM +0100, Milosz Wasilewski wrote:
>Please try with buster. I don't think we uploaded to stretch backports
>for some time now.

We've continued to support stretch-backports in our repos on
apt.lavasoftware.org...

Cheers,
--
Steve McIntyre steve.mcintyre@linaro.org
<http://www.linaro.org/> Linaro.org | Open source software for ARM SoCs