Error: ephemeral containers are disabled for this cluster

Hello,

I haven't found this error in issues, so wonder if this is something cluster specific or I missed any parameter.
Thank you

```
kubectl-debug pod
Error: ephemeral containers are disabled for this cluster ("the server could not find the requested resource"). See --help for additional information
```

```
kubectl version
Client Version: version.Info{Major:"1", Minor:"17", GitVersion:"v1.17.7", GitCommit:"b4455102ef392bf7d594ef96b97a4caa79d729d9", GitTreeState:"clean", BuildDate:"2020-06-17T11:39:47Z", GoVersion:"go1.13.9", Compiler:"gc", Platform:"linux/amd64"}
Server Version: version.Info{Major:"1", Minor:"16", GitVersion:"v1.16.15+IKS", GitCommit:"a7ace239946d71c9305593eacf74b9a9efa25e3b", GitTreeState:"clean", BuildDate:"2020-09-09T00:11:53Z", GoVersion:"go1.13.15", Compiler:"gc", Platform:"linux/amd64"}
```

Start by reproducing `kubectl-debug pod` with the reported Kubernetes client v1.17 and server v1.16 versions, then check whether ephemeral containers are supported by that server version. The payload names no files or tests; done means documenting the compatibility limitation or identifying a specific actionable fix. отмет

Written by the indexing model from the issue text.