Lab 5.1 - Configuring TLS Access and minikube

nngo

I am running minikube version: v1.12.0 using Docker driver
which run Kubernetes v1.18.3
I also have kubectl v1.18.6

On Lab 5.1, I am unable to use curl to access the HTTPS endpoint on my machine at https://172.17.0.2:8443
I believe these are relevant info from my ~/.kube/config for my certificates:

certificate-authority: ~/.minikube/ca.crt
client-certificate: ~/.minikube/profiles/minikube/client.crt
client-key: ~/.minikube/profiles/minikube/client.key

So for step 7, I tried running the following but got the following error:
curl --cert ~/.minikube/profiles/minikube/client.crt --key ~/.minikube/profiles/minikube/client.key --cacert ~/.minikube/ca.crt https://172.17.0.2:8443/api/v1/namespaces/default/pods

curl: (35) You are attempting to import a cert with the same issuer/serial as an existing cert, but that is not the same cert.

BTW: I am able to workaround this via the running kubectl proxy (which was able to listen on 127.0.0.1:8001), allowing me to do curl http://127.0.0.1:8001/api/v1/namespaces/default/pods, but then I am not using TLS certs which defeats the purpose of this lab.

Any help with using TLS certs with curl and minikube this would be appreciated.