shortcode only displays the shortcode

Thank you for your plugin. I used it to display a single product but the page just shows the shortcode itself. I tried it in both the visual editor and text editor. The code generated from your plugin is
[mp_product product_id="2211" title="1" content="full" image="single" meta="1"]

I then added another shortcode on the same page and it displays ok.

https://www.ads-software.com/plugins/marketpress-shortcode-helper/