Use WP thumbnails

Hi, I would like to use a thumbnail size I have already set up on my site, I do not need CRP to crop any images. I’ve found the code I need to edit:

$output .= crp_get_the_post_thumbnail( array(
‘postid’ => $result->ID,
‘thumb_height’ => $thumb_height,
‘thumb_width’ => $thumb_width,
‘thumb_meta’ => $thumb_meta,
‘thumb_html’ => $thumb_html,
‘thumb_default’ => $thumb_default,
‘thumb_default_show’ => $thumb_default_show,
‘thumb_timthumb’ => $thumb_timthumb,
‘thumb_timthumb_q’ => $thumb_timthumb_q,
‘scan_images’ => $scan_images,
‘class’ => ‘crp_thumb’,
‘filter’ => ‘crp_postimage’,
) );

I need to replace with something like ‘echo get_the_post_thumbnail( $post_id, ‘single’ );’ but whenever I do I get errors and the page doesn’t load. It’s probably basic PHP but I’m not great at it, sorry! Any help much appreciated

https://ww.wp.xz.cn/plugins/contextual-related-posts/