Getting error while installing cloud9environment

Based on the error message it appears you're attempting to create the Cloud9 environment as the root user (which should be fine), is that correct? If so, I believe best practices suggest that you not create resources using the root account. I would advise you to create a separate IAM user with the appropriate permissions and try again.

If you still want to use the root user account, have you tried more than once? I've had this problem before with other services and I just had to retry the action.