Is there a way to use get_sidebar() when no widgets are activated?

Ah, default twentysixteen theme had additional function to add body class:

if ( ! is_active_sidebar( 'sidebar-1' ) ) {
    $classes[] = 'no-sidebar';
}

So that was the reason for sidebar not to show up.

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)