Helm: Error: no available release name found

I am getting a couple of errors with Helm that I can not find explanations for elsewhere. The two errors are below.

Error: no available release name found
Error: the server does not allow access to the requested resource (get configmaps)

Further details of the two errors are in the code block further below.

I have installed a Kubernetes cluster on Ubuntu 16.04. I have a Master (K8SMST01) and two nodes (K8SN01 & K8SN02).

This was created using kubeadm using Weave network for 1.6+.

Everything seems to run perfectly well as far as Deployments, Services, Pods, etc... DNS seems to work fine, meaning pods can access services using the DNS name (myservicename.default).

Using "helm create" and "helm search" work, but interacting with the tiller deployment do not seem to work. Tiller is installed and running according to the Helm install documentation.

root@K8SMST01:/home/blah/charts# helm version

Client: &version.Version{SemVer:"v2.3.0", 
GitCommit:"d83c245fc324117885ed83afc90ac74afed271b4", GitTreeState:"clean"}
Server: &version.Version{SemVer:"v2.3.0", GitCommit:"d83c245fc324117885ed83afc90ac74afed271b4", GitTreeState:"clean"}

root@K8SMST01:/home/blah/charts# helm install ./mychart

Error: no available release name found

root@K8SMST01:/home/blah/charts# helm ls

Error: the server does not allow access to the requested resource (get configmaps)

Here are the running pods:

root@K8SMST01:/home/blah/charts# kubectl get pods -n kube-system -o wide
NAME                                      READY     STATUS    RESTARTS   AGE       IP             NODE
etcd-k8smst01                             1/1       Running   4          1d        10.139.75.19   k8smst01
kube-apiserver-k8smst01                   1/1       Running   3          19h       10.139.75.19   k8smst01
kube-controller-manager-k8smst01          1/1       Running   2          1d        10.139.75.19   k8smst01
kube-dns-3913472980-dm661                 3/3       Running   6          1d        10.32.0.2      k8smst01
kube-proxy-56nzd                          1/1       Running   2          1d        10.139.75.19   k8smst01
kube-proxy-7hflb                          1/1       Running   1          1d        10.139.75.20   k8sn01
kube-proxy-nbc4c                          1/1       Running   1          1d        10.139.75.21   k8sn02
kube-scheduler-k8smst01                   1/1       Running   3          1d        10.139.75.19   k8smst01
tiller-deploy-1172528075-x3d82            1/1       Running   0          22m       10.44.0.3      k8sn01
weave-net-45335                           2/2       Running   2          1d        10.139.75.21   k8sn02
weave-net-7j45p                           2/2       Running   2          1d        10.139.75.20   k8sn01
weave-net-h279l                           2/2       Running   5          1d        10.139.75.19   k8smst01