Google Map now requires Google Map API Key for all the service.
To make the map work, you need to generate an API Key.
1. Install & Activate Google Map by intergeo plugin
2. Go to Media -> Google Map, click to Map Setting to insert your API key
In this page, you can see a video tutorial about how to get the API key.
Finally, on the page that you use map direction shortcode, you can add the text widget, copy the Intergeo shortcode and use the direction map as normal.
Please note to use custom CSS to hide Intergeo shortcode on the frontend.