I'm going through the getting-started tutorial for linkerd and I've got stable-2.1.0 installed on kube v1.9.6 and v1.12.3

I've validated that all the pods are running and the mesh is working via the dashboard.

When I try to run linkerd -n linkerd top deploy/linkerd-web in step 4, I get invalid argument back from the controller.

Here's the verbose output:

DEBU[0000] Expecting API to be served over [https://xx.xx.xx.xx:6443/api/v1/namespaces/linkerd/services/linkerd-controller-api:http/proxy/api/v1/]
DEBU[0000] Making gRPC-over-HTTP call to [https://xx.xx.xx.xx:6443/api/v1/namespaces/linkerd/services/linkerd-controller-api:http/proxy/api/v1/SelfCheck] []
DEBU[0000] Response from [https://xx.xx.xx.xx:6443/api/v1/namespaces/linkerd/services/linkerd-controller-api:http/proxy/api/v1/SelfCheck] had headers: map[Content-Type:[application/octet-stream] Date:[Wed, 12 Dec 2018 05:54:06 GMT] Content-Length:[108]]
DEBU[0000] gRPC-over-HTTP call returned status [200 OK] and content length [108]
DEBU[0003] Response from [https://xx.xx.xx.xx:6443/api/v1/namespaces/linkerd/services/linkerd-controller-api:http/proxy/api/v1/TapByResource] had headers: map[Content-Type:[application/octet-stream] Date:[Wed, 12 Dec 2018 05:54:09 GMT]]
Error: invalid argument

Any advice on what I should try next?

I also created this issue on GitHub