woodomart filter onSale

Hello,

I saw this topic but no information: https://www.ads-software.com/support/topic/woodomart-filter-onsale/

I have the same issue could you help me please ?

additionnal information (WordPress in debug mode):

Erreur de la base de données WordPress : [Not unique table/alias: ‘wp_postmeta’]
SELECT wp_posts.ID FROM wp_posts INNER JOIN wp_postmeta ON ( wp_posts.ID = wp_postmeta.post_id ) INNER JOIN wp_postmeta ON (wp_posts.ID = wp_postmeta.post_id) WHERE 1=1 AND ( wp_postmeta.meta_key = '_simple_preorder' AND wp_postmeta.meta_value = 'yes' ) OR ( wp_postmeta.meta_key = '_wpro_variable_is_preorder' AND wp_postmeta.meta_value = 'yes' ) AND ( ( wp_postmeta.meta_key = '_wp_page_template' AND wp_postmeta.meta_value = 'portfolio.php' ) ) AND wp_posts.post_type = 'page' AND ((wp_posts.post_status = 'publish')) GROUP BY wp_posts.ID ORDER BY wp_posts.post_title ASC

Thanks,

BR

Dalmoon