I have found that there is one JS error on your store ie. Cannot read property "toStirng" to null.
Kindly resolve that issue and then check if it's working fine.
I have very little experience with coding in general and only learned some basic Shopify theme coding to add some features to my store. Are you able to describe where I should look and what I should look for to fix this issue with the exit button?
Thanks for your help and quick response,