Update: They fixed the error I got and it did work, It ran a little slow because after logging in it still went to account page then a page that just say "Redirecting" then back to the cart, I am concerned customers would be confused by this, (Keep in mind I am having some slow site issues before this that is being worked on) But it works and would recommend you try it

Tried to install got this error
{"error":1,"status":200,"message":"Exception while installing Optimize Checkout App.","details":"PAShopify isUrlHttps Error : Requested Resource Not Found matching with params : {\"shop\":\"suzieskincare.myshopify.com\",\"type\":\"cart_app\"}"}