ACL KongCredential does not work


I create acl of KongCredential like this

kind: KongCredential
name: credential-acl-plugin-helloworld
namespace: kong
consumerRef: consumer-helloworld
type: acl
group: consumer-helloworld

it’s never worked.
There is no key in consumer hmac restful api.
Is there any wrong with the YAML file?

I got the log from ingress-controller
“queue.go:113] requeuing kong/credential-acl-plugin-helloworld, err entity ‘acl’ not registered”

What should i do to solve this problem?
Thanks for your help.