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I believe that a security group of string is a valid thing to pass for `SecurityGroupOrId`. 

Could you share the exact error?  Is that for the exact code above?

See also <https://pulumi.io/reference/pkg/nodejs/pulumi/awsx/ec2/#SecurityGroupOrId> which indicates that a string should be valid here. 

Hi Luke, thanks for the reply!
I figured out the issue... When I copied over my security group id into my pulumi config, I missed the last number. I put in the full security group id and it's working now!