Faill to parse the doc when Ref is a AWS::SSM::Parameter::Value<List<String>>

[binchenX]

With following template file, the parse will fail with

 ERROR: json: cannot unmarshal string into Go struct field Properties.Properties.SubnetIds of type []string
2021/07/18 16:37:43 There was an error processing the template: json: cannot unmarshal string into Go struct field Template.Resources of type []string

---
 AWSTemplateFormatVersion: '2010-09-09'
 Description: VPC Endpoints for Linux Custom ( STS )

 Parameters:
   VPCId:
     Description: VPC id of the account
     Type: AWS::EC2::VPC::Id

   VPCEndPointSubnets:
     Type: AWS::SSM::Parameter::Value<List<String>>
     Description: List of subnets for STS Private Endpoint
     Default: /CNS/resources/subnets/ic/all

 Resources:
   ecrApiVpcEndpoint:
     Type: "AWS::EC2::VPCEndpoint"
     Properties:
       ServiceName: "com.amazonaws.ap-southeast-2.ecr.api"
       VpcEndpointType: "Interface"
       VpcId: !Ref VPCId
       SubnetIds: !Ref VPCEndPointSubnets
       PrivateDnsEnabled: true
       SecurityGroupIds:
         - !Ref SGVPCEndPoint