Unable to Deploy IAMPolicyMember due to error building resource skeleton for getting IAM resource

[encodifydipi]

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Description

I am trying to deploy 2 roles for one Service Account using IAMPolicyMember , this is the yaml :

apiVersion: iam.cnrm.cloud.google.com/v1beta1
kind: IAMPolicyMember
metadata:
  name: ns-bucketowner
spec:
  memberFrom:
    serviceAccountRef:
      name: webapp-aqua
  role: roles/storage.legacyBucketOwner
  resourceRef:
    kind: StorageBucket
    name: cloud-storage-aqua
    namespace: cloud-storage-lb
---
apiVersion: iam.cnrm.cloud.google.com/v1beta1
kind: IAMPolicyMember
metadata:
  name: ns-objectadmin
spec:
  memberFrom:
    serviceAccountRef:
      name: webapp-aqua
  role: roles/storage.objectAdmin
  resourceRef:
    kind: StorageBucket
    name: cloud-storage-aqua

They are deployed using Helm + ArgoCD, through a Jenkins pipeline. From December I am getting this random error :

Update call failed: error building resource skeleton for getting IAM resource: error building unstructured skeleton for getting IAM resource: could not resolve member identity for IAMPolicyMember: couldn't resolve the value for target field email from the referenced resource aquafull2337noparallel/webapp-aqua 

I am puzzled on the issue. Any thoughts / suggestions on how to fix? Thanks