Modal Window does not scroll

Firstly thanks for the plugin. This perfectly suits my needs.

I have put the portfolio shortcode on this page – https://aerobubble.com/portfolio-test/
If I click on the portfolio it shows up in the modal window but the structure of the content is very wired. There is a lot of space at the top and between the elements. And also the window is not scrollable and so not all text shows.

Please help me so I could resolve the issue.

Thanks,
Shreyans

https://www.ads-software.com/plugins/waving-portfolio/