The Global Text name should just be NameVariable.
& is used to put strings and expressions together (for when you need to display it later).
Edit: quick example - ... .capx?dl=0
OK so I have a problem. I'm trying to make it so that when you press the OK button, it saves the name and goes to the next screen at the same time.
Global Text as Name Variable
Button- On clicked- Set name Variable to textbox.text
Button- On clicked