How do I enable Google App Engine API with Terraform?

I'm attempting to enable the AppEngine service via Terraform but I'm getting an error:

As far as I know all that should be required to enable the service/API is:

Answer

"If you enabled this API recently, wait a few minutes for the action to propagate to our systems and retry., accessNotConfigured" What does it do if you retry a bit later ? (a null_resource just to wait a few minutes before the rest of your plan could be a solution if it works after a retry) @Tensibai, not a timing issue in this case. The API was enabled successfully but all following attempts to create the appengine app fail with that error. Yes that's what the message says, the API is created but you may need to way a bit to use it.