when only .spec.desiredUpdate.version is provided in policy: "platform image defined but value is missing" 

when only .spec.desiredUpdate.image is provided in policy: "unable to find version on update graph on url https://api.openshift.com/api/upgrades_info/v1/graph?channel=stable-4.11"

from Nov 15th -- quay.io/openshift-kni/cluster-group-upgrades-operator:latest

1. Apply the CRs (Version only case)

apiVersion: v1alpha1
kind: ClusterGroupUpgrade
metadata:
  creationTimestamp: null
  name: generated-cgu-disk-full
  namespace: talm-test
spec:
  actions:
    afterCompletion: {}
    beforeEnable: {}
  clusters:
  - cnfdf05
  enable: true
  managedPolicies:
  - generated-policy-disk-full
  remediationStrategy:
    maxConcurrency: 1
    timeout: 250
status:
  status:
    completedAt: null
    currentBatchStartedAt: null
    startedAt: null

apiVersion: v1
kind: Policy
metadata:
  creationTimestamp: null
  name: generated-policy-disk-full
  namespace: talm-test
spec:
  disabled: false
  policy-templates:
  - objectDefinition:
      apiVersion: policy.open-cluster-management.io/v1
      kind: ConfigurationPolicy
      metadata:
        creationTimestamp: null
        name: generated-policy-disk-full-config
      spec:
        evaluationInterval:
          compliant: 10s
          noncompliant: 10s
        namespaceSelector:
          exclude:
          - '*'
          include:
          - kube-*
        object-templates:
        - complianceType: Musthave
          objectDefinition:
            apiVersion: config.openshift.io/v1
            kind: ClusterVersion
            metadata:
              creationTimestamp: null
              name: version
            spec:
              channel: stable-4.11
              clusterID: ""
              desiredUpdate:
                force: false
                image: ""
                version: 4.11.12
              upstream: https://api.openshift.com/api/upgrades_info/v1/graph
            status:
              availableUpdates: null
              capabilities: {}
              desired:
                image: ""
                version: ""
              observedGeneration: 0
              versionHash: ""
        remediationAction: Inform
        severity: low
      status: {}
  remediationAction: Inform
status: {}

apiVersion: v1beta1
kind: PolicySet
metadata:
  creationTimestamp: null
  name: generated-policyset-disk-full
  namespace: talm-test
spec:
  policies:
  - generated-policy-disk-full
status: {}

apiVersion: v1
kind: PlacementRule
metadata:
  creationTimestamp: null
  name: generated-placementrule-disk-full
  namespace: talm-test
spec:
  clusterSelector: {}
  clusters:
  - name: cnfdf05
status: {}

apiVersion: v1
kind: PlacementBinding
metadata:
  creationTimestamp: null
  name: generated-placementbinding-disk-full
  namespace: talm-test
placementRef:
  apiGroup: apps.open-cluster-management.io
  kind: PlacementRule
  name: generated-placementrule-disk-full
status: {}
subjects:
- apiGroup: policy.open-cluster-management.io
  kind: PolicySet
  name: generated-policyset-disk-full 

2. See error in CGU

Error under "Description of problem"

No errors for when only Version or Image is provided (it was working in the previous version btw (I think 4.11?))

desiredUpdate:                 
  force: false                 
  image: ""                 
  version: 4.11.12

The image has "" as value because the CR was generated in Go and the underlying code is initiated with a default value (in this case "" for string)

Go for completeness" 
clusterVersion := configv1.ClusterVersion{
   TypeMeta: metav1.TypeMeta{
      Kind:       "ClusterVersion",
      APIVersion: "config.openshift.io/v1",
   },
   ObjectMeta: metav1.ObjectMeta{
      Name: "version",
   },
   Spec: configv1.ClusterVersionSpec{
      DesiredUpdate: &configv1.Update{
         Version: version,
         Force:   false,
      },
      Upstream: configv1.URL(helper.Config.Ran.OcpUpgradeUpstreamURL),
      Channel:  GetClusterChannel(spokeclient),
   },
}