You may receive this error when you update your Minikube installation but Minikube is still referencing the old files inside $HOME/.minikube directory. To avoid this error, simply delete the .minikube directory and start Minikube again. You can use the below given command.
$ minikube delete — all — purge
$ rm -rf .minikube/
$ minikube start --vm-driver=virtualbox
Hope this will help you.