Custom post ui plugin & WP_Query - Polylang

I used to have a multilingual website translated with Qtranslate but now I am changing this to Polylang. I had a wp_query (below) that was working fine and when converted to polylang shows that no posts match my criteria

?php
    $args = array(
    'post_type' = 'conversatietafel',
    'posts_per_page' = 10,
    'category_name' = 'Volwassene',
  'public' = True,
    );

$the_query = new WP_Query( $args );
?

?php if ( $the_query-have_posts() ) : ?
?php while ( $the_query-have_posts() ) : $the_query-the_post(); ?

Categories and posts are translated and found in Polylang.

I'm not very good in coding, my excuse for this.

Kind regards, Xavier