spec.visualization.type is missing in ClusterLogging instance example 

apiVersion: logging.openshift.io/v1
kind: ClusterLogging
metadata:
  name: instance 
  namespace: openshift-logging 
spec:
  collection:
    type: vector
  logStore:
    lokistack:
      name: logging-loki
    retentionPolicy:
      application:
        maxAge: 7d
      audit:
        maxAge: 7d
      infra:
        maxAge: 7d
    type: lokistack
  visualization:
    ocpConsole:
      logsLimit: 15
  managementState: Managed

apiVersion: logging.openshift.io/v1
kind: ClusterLogging
metadata:
  name: instance 
  namespace: openshift-logging 
spec:
  collection:
    type: vector
  logStore:
    lokistack:
      name: logging-loki
    retentionPolicy:
      application:
        maxAge: 7d
      audit:
        maxAge: 7d
      infra:
        maxAge: 7d
    type: lokistack
  visualization:
    type: ocp-console
    ocpConsole:
      logsLimit: 15
  managementState: Managed