What you are using is an excerpt for a commercial book by T. Anderson. Others cannot access it unless they purchase the book.
You are new, so you do not know that the link to your Project cannot be accessed by anyone except you and (with your permission) MIT. If you want to share your blocks, you have to provide an image of the blocks and paste them here.
Rather than struggle with a tutorial in a language you do not understand, you might use the following advice and write you own app:
You can 'find your address' by using the LocationSensor , perhaps see HOW TO: Parse a LocationSensor's Current Address by SteveJG
You can send the CurrentAddress information obtained from a LocationSensor to send the address to someone by email (use the ActivityStarter) or as a Text message.
You are new, so the following resources should help you learn to use the AI2 tools. A very good way to learn App Inventor is to read the free Inventor's Manual here in the AI2 free online eBook http://www.appinventor.org/book2 ... the links are at the bottom of the Web page. The book 'teaches' users how to program with AI2 blocks.
There is a free programming course here http://www.appinventor.org/content/CourseInABox/Intro and the aia files for the projects in the book are here: http://www.appinventor.org/bookFiles
How to do a lot of basic things with App Inventor are described here: http://www.appinventor.org/content/howDoYou/eventHandling .
Also look here http://kio4.com/appinventor/index.htm and here http://www.imagnity.com/tutorial-index/ for more tutorials.
Learn about components http://ai2.appinventor.mit.edu/reference/components/
and visit the Library http://appinventor.mit.edu/explore/library Help>Library on the MENU