Question regarding tutorial: Adding Go to Home button.

Rayruu

I am following the tutorial and in that regard I was not able to add position variable to my button. 

In the "Position variable" I get up T_Rob1 and MainModule, but it has only loading Icon and I do not get any variable up.

I tried to open up the example and open this in robot studio and app studio. Connect and deploy. 
But then I get an event error that no such logic or undefined variable exists ?

The other buttons work fine, but it looks like I am missing something.