[Slide In] shortcode plugin not working with slide in plugin

I'm using the slide in plugin from WPMU DEV and im using the shortcodes ultimate plugin https://wordpress.org/plugins/shortcodes-ultimate/

I want to create a slide in with text and a call to action as a button using the shortcodes plugin.

the shortcodes plugin creates a button in a normal post but doesn't create a button inside the slide in. it just shows the shortcode text.

how do I get the shortcode to work inside the slide in plugin?