Adding Google GCM Api Key Azure Notification Hub Error

Question

We are trying to add our GCM API key to the azure notification hub and we are receiving the following error:

SubCode=40000. Failed to validate credentials with GCM.

Answer 1

SubCode=40000. Failed to validate credentials with GCM.

This will probably fix this error:

Under the SERVICES tab in the APIs console for Google devs:

• enable Google cloud messaging for android