loading problem

Hello! I am using this plugin since last year. It is really good. But for some time, I am noticing that when my website is opened on mobile, the subscriber popup doesn’t let the page load until it is loaded, which increases the overall loading time of the site, and hence, it can hurt my ranking. I have tried all ways: instant pop up on load, pop up after some time or %age of scrolling.

The page I need help with: [log in to see the link]