Checked that the expected k8s context is in use via kubectl config get-contexts
Confirmed: the middle component and base64 decode it you should be able to confirm the groups that the user have (this is the same level of information that dex-k8s-authenticator provides you when generate the kubeconfig details).
Similiar to https://github.com/mintel/dex-k8s-authenticator/issues/30
for my case, I confirmed:
When checking the api-server log..I see this..has anyone ran into the error below?