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Having trouble with the margins of a subscribe pop up

Hey guys, I’m having a bit of trouble regarding a pop up. I just started helping my boss with his webflow but I’m very new to it. On one of our sites we have an email sign up pop up that appears once you have viewed at least 50% of the page and waited for a second. The pop up is misaligned and half is off screen. This only happens when people are viewing on mobile. I haven’t been able to figure out a fix yet or find out where this modal would even be in the design section. I’ve seen how to make them but not how to find an existing one to edit/fix. Any help would be much appreciated. Thank you.

Here is my public share link: Why Self-Improvement is a Means to no End | Cody McLain this is the live URL, the problem only happens when viewing on a mobile device.
(how to access public share link)