Can’t register

When I try to register to use the plugin, it gives me an error and displays this code snippet:

function() {
                return f && (c && !b && (h = f.length - 1,
                g.push(c)),
                function d(b) {
                    n.each(b, function(b, c) {
                        n.isFunction(c) ? a.unique && j.has(c) || f.push(c) : c && c.length && "string" !== n.type(c) && d(c)
                    })
                }(arguments),
                c && !b && i()),
                this
            }

The console log says the page was loaded over HTTPS, but requested an insecure XMLHttpRequest endpoint https://api.thetshirtguylv.com/AdminAPI.svc/Register. This request has been blocked; the content must be served over HTTPS.