I was not aware that it was necessary.  

Please, update your support first if you need customization help. Then, send detailed screenshot how you added shortcode and where

Hello,

I tried https://rehubdocs.wpsoul.com/docs/rehub-theme/best-conversion-profit-helpers/advanced-cross-linking/ but the shortcodes given there are not working. 

For example: [wpsm_recent_posts_list data_source="cpt" post_type="post" show="6" image="1" nometa="1" border="1" columns="2" searchtitle=CURRENTPAGE]

Do you know why this is happening?

Kind regards