Not working? Please read * Using the Location Sensor. There are two aia files with the tutorials. Load the aia as a Project and run it. What happens?
"No address available" is shown. Why?
No address available most frequently means that an address is not available in Google's database for the specific geocoordinates determined by the LocationSensor / gps receiver.
The default geocoordinates for the LocationSensor, prior to a LocationChanged event is 0,0 . This location is the Atlantic Ocean off the west coast of Africa. If you attempt to get the CurrentAddress for 0 latitude, 0 longitude, the 'address' is rendered as No address available.
Are the geocoordinates reported 0,0 ?
Some geocoordinates are rural areas; farmer's fields, desert etc. Naturally, No address available for them. Sometimes a location is in a congested city street where street addresses are confusing such that no address is determined from the database. The CurrentAddress LocationSensor blocks ONLY work if your device is connected with WIFI or a Mobil Network because the LocationSensor must access an online Google database.
Here is how the CurrentAddress block works: HOW TO: Parse a LocationSensor's Current Address by SteveJG . This tutorial has an attached aia file. You might load the Project and report to us what happens. kamsahamida (감사합닏) 
Receiving No address available usually means you are not receiving a satellite fix or there is an issue with your Blocks. You did not share an image of the code Blocks you expect to show a location so we can not tell what might be wrong with your Blocks.
Does this explanation help you?