Error while trying to register managed instance

Question

I've down this before for other raspberry pi's without a problem, but know I get this error:  
  
ERROR Registration failed due to error registering the instance with AWS SSM. MissingEndpoint: 'Endpoint' configuration is required for this service  
  
Using this as the guide: https://docs.aws.amazon.com/systems-manager/latest/userguide/sysman-install-managed-linux.html  
  
Any ideas?

Answer

Solved. I had failed to attach the proper service role for a hybrid environments.  
  
aws iam attach-role-policy \  
    --role-name SSMServiceRole \  
    --policy-arn arn:aws:iam::aws:policy/AmazonSSMManagedInstanceCore

Error while trying to register managed instance

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