certified minio operator failed to install on OpenShift 4.8

[Jooho]

Certified Minio operator 4.0.9 failed to install on OCP 4.8 because some requirements are not met.
The following are the requirements.

  requirementStatus:
    - group: operators.coreos.com
      kind: ClusterServiceVersion
      message: CSV minKubeVersion (1.19.0) less than server version (v1.21.6+bb8d50a)
      name: minio-operator.v4.0.2
      status: Present
      version: v1alpha1
    - group: apiextensions.k8s.io
      kind: CustomResourceDefinition
      message: CRD is present and Established condition is true
      name: tenants.minio.min.io
      status: Present
      uuid: a587e2cb-53e9-4316-a625-9f038ec5338c
      version: v1
    - group: ''
      kind: ServiceAccount
      message: Service account does not exist
      name: minio-operator
      status: NotPresent
      version: v1