filter_og_image.php

<?php
/********* DO NOT COPY THE PARTS ABOVE THIS LINE *********/

/* Change Open Graph image URLs in Yoast SEO for categories + Taxonomy Images plugin */
add_filter( 'wpseo_opengraph_image', 'change_opengraph_image_url' );

function change_opengraph_image_url( $url ) {
  $image_url = apply_filters( 'taxonomy-images-queried-term-image-url', '' );
  if (is_category() && $image_url) {
    return $image_url;
  } else {
   return $url;
  }
}