Pagination shown but not working

Hi all,

I know “pagination” questions are probably very common. However the things I’ve found didn’t exactly identify where the issue is and how to resolve this the proper way in the template.

So I’m using Progreen template for a website. It has sort of a sitebuilder plugin. One of the pages built has a “Full blog” element added.

When the resulting page is shown in the browser it shows the first 10 posts. And at the bottom a button for each page (1, 2, 3).
When I click on it I get a <thepage>/page/2 in the address bar and the page is reloaded. However this again shows the first 10 posts.

I’ve found the place in the code where it loops:
while (have_posts()) : the_post();

However not sure where the query actually happens.

Also important to note is that if I go to the page marked “Posts Page” pagination is working.

Before I go tampering with the sort of queries and functions WordPress provides I would like some guidance/help on how to tackle this.

Thanks a lot in advance!