Hello Caridad,
thanks for your fast support, but nothing has changed.
I've added the following code to my functions.php (Child Theme)
<?php function add_my_post_types( $query ){ if( $query->is_category ) { $query->set( 'post_type', array( 'post', 'hk', 'vk', 'wm', 'hm' ) ); } return $query; } add_action( 'pre_get_posts', 'add_my_post_types' ); ?>
hk, wk, wm and hm are the needed categories to display on the archive page.
Do you have other suggestions for the problem?
Which is the way with the custom taxonomy?
Regards,
Thorsten