I have a problem. Let me know how to solve this, please. Thanks.

Assuming by "solve" you mean remove the warning message...

kubectl config use-context rancher-desktop

I don't know why it's a "fatal" message. It should only be a warning to you, indicating that your

kubectl

is currently pointing to a different context than Rancher Dasktop - which is a perfectly valid thing to do.

Thanks a lot.