Helm and Library not working! (enterprise Proxy)

RKE cluster install on servers with a enterprise proxy configured.

NAME STATUS ROLES AGE VERSION EXTERNAL-IP OS-IMAGE KERNEL-VERSION CONTAINER-RUNTIME
172.17.101.70 Ready controlplane,etcd,worker 3d v1.10.1 Ubuntu 16.04.4 LTS 4.4.0-128-generic docker://1.13.1
172.17.101.71 Ready controlplane,etcd,worker 3d v1.10.1 Ubuntu 16.04.4 LTS 4.4.0-128-generic docker://1.13.1
172.17.101.72 Ready controlplane,etcd,worker 3d v1.10.1 Ubuntu 16.04.4 LTS 4.4.0-128-generic docker://1.13.1

Server: 172.17.101.85: Rancher/Rancher server.

Problem:
on the cattle website I don’t see the catalogs. (no Library , no Helm)
Helm installation is not working:
$ helm init
Creating /home/master/.helm/repository/repositories.yaml
Adding stable repo with URL: https://kubernetes-charts.storage.googleapis.com
Error: Looks like “https://kubernetes-charts.storage.googleapis.com” is not a valid chart repository or cannot be reached: Get https://kubernetes-charts.storage.googleapis.com/index.yaml: proxyconnect tcp: tls: oversized record received with length 20527

Test with wget is oke:
wget https://kubernetes-charts.storage.googleapis.com/index.yaml // file downloaded.

I don’t see messages send to the proy-server. (tcpdump)

The same configuration (hel version …) has no problem without Proxy.
The servers are not the same but ubuntu … versions are the same.

Has someone the error: tls: oversized record received with length 20527 ?

Problem with RKE cluster solved, helm installation is working. (helm init).
Solution see:
https://github.com/helm/helm/issues/4271

The Rancher website still has problems to show the templates in the website.
Empty screen, Rancher version v2.0.7