Accessing values from ACF sub field (flexible content area) in PHP

You iterate through posts obtained by the get_posts(), so you have to pass post ID as the second parameter of the function have_rows().
By default ID of current post is used.

foreach ($articles as $article) {

    $value = null;
    if( have_rows( 'info_items', $article->ID ) ): 
        while( have_rows( 'info_items', $article->ID ) ): the_row();

            $value = get_sub_field('info_location');

        endwhile;

    endif;

    echo "<br>{$article->ID} ";
    var_dump($value);
}