Hi @jcvillacorta,
Thanks for choosing IntellyWP products.
I have checked your issue with our techs and seems that could be connected to the number of posts that you have defined (sometimes our plugin require a lot of time to load all the post inside the dropdown that, theoretically is shown in this popup when you click the shortcode button in WP editor).
We are working on this to find a possible fix, in the while by suggestion is to use manually the shortcode due to is very easy.
We have 2 different shortcodes that you can insert in any place or your post content.
[irp] will insert the related box searching automagically the best content to fix (based on categories or tags)
[irp posts=”YOUR-POST-ID”] will insert a specific post inside the content not necessary with the same categories or tags
Please be aware that when you will insert one of this 2 shortcodes manually our plugin will not insert any other related box for this article.
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Let me know if you have any additional questions and will be a pleasure to help you.
Cheers
Alex