The api key goes at the green arrow
Did you copy the key exactly, without any additional spaces? To understand why you got an error, it is necessary to review how you used the code snippet. 
Do not reveal your api code (strike it out).
When you registered for your api, I believe they ask for a Project name (sorry don't remember); if your new Project has a different identification, that might be the issue. Unfortunately I don't know.
Review