this.get_context is not a function when call getMyProperties

When I call the code below:

script type="text/javascript" src="/_layouts/15/SP.js" /script

script type="text/javascript" src="/_layouts/15/SP.UserProfiles.js" /script

script type="text/javascript"

var personProperties; function getUserProperties() {

        // Get the current client context and PeopleManager instance.
        var clientContext = new SP.ClientContext.get_current();
        var peopleManager = new SP.UserProfiles.PeopleManager(clientContext);

        // Get user properties for the target user.
        // To get the PersonProperties object for the current user, use the
        // getMyProperties method.
        personProperties = peopleManager.getMyProperties();

        // Load the PersonProperties object and send the request.
        clientContext.load(personProperties);
        clientContext.executeQueryAsync(onRequestSuccess, onRequestFail);
    }

    // This function runs if the executeQueryAsync call succeeds.
    function onRequestSuccess() {

        // Get a property directly from the PersonProperties object.
        var messageText = " \"DisplayName\" property is "
            + personProperties.get_displayName();

        // Get a property from the UserProfileProperties property.
        messageText += "<br />\"Department\" property is "
            + personProperties.get_userProfileProperties()['Department'];
        alert(messageText);
    }

    // This function runs if the executeQueryAsync call fails.
    function onRequestFail(sender, args) {
        alert("Error: " + args.get_message());
    }

    (function () {
        //REST API

$(function () { SP.SOD.executeOrDelayUntilScriptLoaded(getUserProperties, 'SP.UserProfiles.js'); }); })(); the getMyProperties() rise an error like: undefined is not a function; can someone help me? It seem's to be internal on SP.UserProfile.js