Quote Originally Posted by marton_1 View Post
OK, did some more research.
I am running this on my non SSL xampp test site PC.

My Admin site opens fine after installing the CSS JS Loader but when I try to open the storefront I get the error message "PHP Notice: CURL error checking plugin versions: 60:SSL certificate problem: self signed certificate in certificate chain"

This message I discovered is an SSL Cerificate failure, but I do not want or have SSL on my test store front.
The message has NOTHING to do with having SSL on your storefront. That's user-configurable SSL.
This message is related to a basic server misconfiguration, explained here: SSL Explained - Back and Front
And, given that you're using XAMPP, you may not be able to fix it ... in which case you'll have to live with these kinds of errors happening anytime the test store needs to connect to an external resource.
So if you're going to comment-out sections of the code to suit your local environment, MAKE SURE you uncomment them before putting changes into production, else your store will be broken, or worse, your live store might be insecure.