Unable to configure remote openshift clusters

[kass22-sys]

Hello,

We have a fluxcd instance on a main openshift cluster. This one is also used to configure AKS clusters, this works without an issue. When i try to do the same for another openshift cluster i get this error: dry-run failed: failed to get API group resources: unable to retrieve the complete list of server APIs: v1.

This is the kustomize i use:

apiVersion: kustomize.toolkit.fluxcd.io/v1
kind: Kustomization
metadata:
  name: tenants
  namespace: <myclustername>
spec:
  interval: 1h
  retryInterval: 3m
  timeout: 5m
  prune: true
  wait: true
  path: ./clusters/<myclustername>/tenants
  sourceRef:
    kind: GitRepository
    name: flux-system
    namespace: flux-system
  # Specifies the kubeconfig for the remote cluster
  kubeConfig:
    secretRef:
      name: cluster-kubeconfig
      key: notesPlain

In `./clusters/<myclustername>/tenants` is a simple yaml file to create a namespace.

The secret contains a full kubeconfig as a secret to a service account with cluster-admin permission.

I put the kubeconfig in /tmp/test.yaml to test and then i can successfully run kubectl --kubeconfig /tmp/test.yaml create ns for example as well as all other commands i would excpect to work.

Does someone know how i can resolve this issue or what i am doing wrong?