gardener command - controlplane does not work

Current setup
```
OS: macOS 15.4
shell: fish, version 4.0b1
switcher: v0.9.3
```

Problem:
```
┬─[foo@maverick:~/.kube]─[14:37:39]─[K: (⎈ garden-qrewcdx7ik--wjew1b0bdr-external|garden-qrewcdx7ik default)]
╰─>$ kubeswitch gardener controlplane
Error: internal error
internal error
```
I can not target the conrol plane of any shoot cluster. No idea how to debug this issue. 