Unable to establish DNSSEC chain of trust for .com domain hosted in Route 53

Question

When setting up DNSSEC for our example.com domain in the Route 53 console, I am able to complete the first part successfully. Now I need to establish the chain of trust.  AWS help tells me to add a DS record. However, DS is not an option in the "type of record dropdown" when using Quick Create.

Using the wizard produces this error message:
InvalidChangeBatch 400: RRSet of type DS with DNS name example.com. is not permitted in zone example.com.

Does AWS automatically add the DS records for the .com zone?

Answer

The following documents appear to support DNSSEC settings themselves.  
I was wondering if there is something wrong with the way it is set up?  
https://docs.aws.amazon.com/Route53/latest/DeveloperGuide/domain-configure-dnssec.html

Unable to establish DNSSEC chain of trust for .com domain hosted in Route 53

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