I don’t think that you have placed shortcode in that page. If you have done so, you may need to check these 2 settings.
1. Make sure the template used by Blog page is default template (or similar ones). You can find this from page edit panel left side.
2. From Settings > Reading > Front page displays > Post Page, Select empty option if it is using blog page.
Hi, I can not get the plug in to work. I completed the 2 instructions you have above but it is still not working. I copied and pasted the shortcode into the Page Recipes, when I hit preview it works but as soon as I hit update and go to the actual website, it is not masonry. Thanks!!