Problem faced with using the Network Map Panel in Grafana v6.5.3

I have downloaded the Network Map Panel in Grafana (v6.5.3) but in spite of using this ({z}/{x}/{y}.png access_token=pk.eyJ1IjoibmFiaG9uZWlsIiwiYSI6ImNrZjg4aGZsbjAxanozMmxkcmQ3aDltYm4ifQ.IzsoDNczPtm2hVNyjR8k5g) url in the Map Url tab after generating the token from the MapBox Account no Map is displayed. I have also tried to use the image URL by directing the path of the image file inside the Grafana folder still nothing is shown on the plugin. Could you kindly guide me through this process ?