Error with Login with Paypal using sandbox. I get the error invalid client_ID or redirect_uri

[tsango]

Been at this for days now and cannot seem to resolve this error.

I am trying to implement the Log in with PayPal initially in Sandbox, and running on my local machine (WAMP).

When I click the login button I get the error :  This action isn't supported. Please return and report this error so that we can support it in the future. (invalid client_ID or redirect_uri)

I am using PHP, JAVA under WAMP

The login button is :

            <span id='lippButton'></span>

            <script src='https://www.paypalobjects.com/js/external/api.js'></script>

            <script>

            paypal.use( ['login'], function (login) {

                login.render ({

                    "appid":"<clientid>",

                    "authend":"sandbox",

                    "scopes":"openid Full name Email address",

                    "containerid":"lippButton",

                    "responseType":"code",

                    "locale":"en-us",

                    "buttonType":"LWP",

                    "buttonShape":"pill",

                    "buttonSize":"lg",

                    "fullPage":"true",

                    "returnurl":"http://localhost.<mysite>:8080/account.php"

                });

            });

            </script>